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You can manually configure arrays and logical drives using
three kinds of configuration: For a comparison of what you can do with each kind of configuration,
see Table 3-1 “Capabilities of Each Kind of IRM Configuration”. Using
Easy Configuration | |
This section describes the steps for an Easy Configuration. Note that these steps assume you have started
IRM and (if applicable) selected the HP RAID 4Si controller you
want to configure. Menu path: "Management
Menu" → Configure → Easy Configuration The "Easy Configuration - ARRAY SELECTION MENU" displays. Information Shown In the "Easy Configuration - ARRAY SELECTION MENU," the
physical drives that are connected to the HP RAID 4Si controller
are shown according to the controller channel they are on. The other
information shown for each physical drive is as follows: - SCSI ID (ID)
The physical drive's
SCSI ID (0 through 15). - Drive state
The physical drive's
state, which is one of these values: RDY: Ready—The drive is functioning normally
but is not part of a configured logical drive, and is not designated
as a Hot Spare. ONL: Online—The drive is functioning normally and
is part of a configured logical drive. RBLD: Rebuild—The drive is being rebuilt with
data from a failed drive. HSP: Hot Spare—The drive is functioning normally and
is designated as a Hot Spare drive for the controller, to be used
if an online drive fails. Note that this can also be referred to
as a Global Hot Spare (GHS). FAIL: Failed—A fault has occurred in the drive, placing
the drive out of service. SES: A non-SCSI device—This provides enclosure services,
which gives information about temperature, power supplies, fans,
disk drive mapping, etc., for each JBOD you are using. You can use
the irdiag -v command to see the information supplied by the
SES device for your JBOD. PROC: A non-SCSI device—This is an enclosure
in SAF-TE mode. Like an SES device, it provides enclosure services, which
gives information about temperature, power supplies, fans, disk
drive mapping, etc., for each JBOD you are using. You can use the
irdiag -v command to see the information supplied by the
SAF-TE device for your JBOD.
- Array
The array number (
Ann) and the physical drive's number within
the array (0x). For example, A00-01 means array A00, physical drive 01. Note that
this information is displayed for only a physical drive that has
been configured in an array.
Ensure that the physical
drives you want to configure are available (shown as RDY). From the available physical drives,
select the drives you want in the array. To do this, use the up
and down arrow keys to highlight a drive and then press the space
bar to select the drive. Do this for each drive you want in the
array. Note that if you select a drive by mistake, just re-highlight
the drive and press the space bar to unselect it. | | | |  | TIP: As you select a physical drive, IRM assigns it an array
number/physical drive number combination. The array and physical
drive numbers are assigned sequentially, beginning with 00. For
example, if the latest array number is A04, the array number A05
is assigned to each drive as you highlight it and select it for
the next array you configure. Within that array, the first drive
you highlight and select is assigned number 00, the second drive
01, and so on until you stop selecting drives for that array. | | | | |
When you have selected all of
the physical drives you want in the array, press the Enter key to configure the array into a logical drive. The "Logical Drives Configured" screen,
with the "Logical Drive n" menu to the lower left, displays. The "Logical
Drives Configured" screen lists the logical drives and
this information about each drive: State, which is one of these
values: OPTIMAL—The logical drive is in good condition.
All of the configured physical disks are online. DEGRADED—The logical drive is functioning but
is not in optimal condition. One of the configured physical drives
has failed. OFFLINE—The logical drive is no longer functioning.
One or more of the configured physical drives have failed.
You are placed in the "Logical Drive n" menu. Here, you further configure the logical
drive, by using the up and down arrow keys to highlight the item
you want; press Enter to select the item. The possible values are then listed.
Use the arrow and Enter keys to select the value you want. You are then returned
to the "Logical Drive n" menu, where you can select another item,
if needed. The configuration information you can specify through the "Logical
Drive n" menu is as follows: RAID—The RAID level. Based on the number of
physical drives in the logical drive, IRM determines the default
level. Because this is an Easy Configuration, spanning is not allowed.
So, the valid RAID levels are the following: 1
through 8 disks = RAID 0 3 through 8 disks = RAID
3 3 through 8 disks = RAID
5
Note that if enough physical drives are in the logical drive,
you can change this value. For example, if two physical drives are
in the logical drive, IRM sets this value to 1: you can change it to 0 if you want to. However, if only one physical
drive is in the logical drive, 0 is the only acceptable value. Size—The size of the logical drive. Based
on the RAID level and the maximum number of megabytes available
from all of the physical disks in the logical drive, IRM determines
the size. Advanced Menu Menu path: "Management
Menu" → Configure → Easy Configuration → Logical Drive n → Advanced Menu If you select this item, you are placed in another menu (titled "Advanced")
to configure the following parameters: Stripe Size—Specify the stripe size (size of segments
written to each disk), in KB (2, 4, 8, 16, 32, 64, 128). The default
is 64. Note that we recommend you
specify 64. This is because in most cases, a 64KB stripe
size provides the best performance. Specify a different value only
if you want to test your applications' performance with
different stripe sizes. Write Policy—Specify either write-thru (WRTHRU) or write-back (WRBACK). In WRTHRU mode, data is written to the cache and the disk.
In WRBACK mode, data is written to only the cache; it can
be flushed out to the disk from the cache. Note that WRBACK can increase performance significantly. So, we
recommend you specify
WRBACK unless the controller's battery health
is questionable—WRBACK relies on the battery to hold data in cache if
the HP-UX system loses power (a fully charged battery holds data
for up to 72 hours). So, if you use WRBACK, be sure the battery is in good condition (
irmd will tell you if it detects a problem with the
battery). The default is WRTHRU. Read Policy—NORMAL, READAHEAD, or ADAPTIVE. NORMAL implies no read-aheads from disk are done.
READAHEAD means read ahead a full stripe from the disk.
ADAPTIVE implies read ahead a full stripe if two successive
READ calls are in the same stripe. ADAPTIVE provides the best performance, in most cases.
So, we recommend you use a different
setting only if you want to experiment to see if another setting
provides better performance. The default is ADAPTIVE. Cache Policy—Beginning with HP RAID 4Si versions B.11.00.04
(HP-UX 11.0) and B.11.11.01 (HP-UX 11i), this is always set to CachedIO, which means disk data is always cached in local
memory (that is, memory on the HP RAID 4Si controller). Note that
in earlier versions of HP RAID 4Si, Cache Policy could also be set
to DirectIO, which means that disk data (the requested amount)
is transferred directly to system memory. If you previously set
this to DirectIO (in an earlier version), and then installed one
of the above versions, this changes to CachedIO the first time you do a save of the configuration.
To accept the values specified in the "Advanced" menu,
press the Esc key to exit the menu. You are placed back in the "Logical
Drive n" menu. Span—Because this is an Easy Configuration,
spanning is not allowed. So, this is set to NOSPAN (displays as Span = NO on the "Logical Drive n" menu), and you cannot change it.
When you have specified all of
the information on the "Logical Drive n" menu, highlight the Accept option; press Enter. If at least one physical drive is still available (RDY), you are placed back in the "Easy Configuration
- ARRAY SELECTION MENU." Do one of these things: If you want to configure
another array and logical drive—using the Easy Configuration—go
back to step 1. If you want to designate
a physical drive as a Hot Spare—using the Easy Configuration—go
to step 5. If you do not want to configure
anything else, press Esc. The "Logical Drives Configured" screen
displays, showing a list of all the controller's configured
logical drives (including the one you just configured). You are
placed in the "Save Configuration" dialog box. Go
to step 6.
If no physical drives are still available, the "Logical
Drives Configured" screen displays, showing a list of all
the controller's configured logical drives (including the
one you just configured). You are placed in the "Save Configuration" dialog
box. Go to step 6. If you want to designate a drive
as a Hot Spare, follow these steps: Highlight the
physical drive you want to designate as a Hot Spare and press F4. You are asked to confirm that
you want to designate that physical drive as a Hot Spare. If you do not want to make that drive a Hot Spare,
select NO. You are placed back in the "Easy Configuration
- ARRAY SELECTION MENU." Go to step c. If you want to make that drive a Hot Spare, select YES. You are placed back in the "Easy Configuration
- ARRAY SELECTION MENU." Note that the physical drive now
shows as HSP. Go to step c. | | | | | TIP: If you designate a drive as a Hot Spare (it shows as HSP), but then change your mind (and do not want it
to be a Hot Spare), you can change
it. Press Esc. You are asked to confirm whether you want to save the
configuration (which includes the Hot Spare). | | | | |
If you select NO, all of the
configuration you have done so far (or since the last time you saved
it) is lost, including the Hot Spare. You are placed back in the "Configure" menu;
select Easy Configuration and go back to step 1 (the beginning of Easy Configuration). If you select YES, the configuration is saved (including the Hot
Spare). But, you can still change the Hot Spare back to a "regular" physical drive,
by following these steps: Menu
Path: "Management Menu" →
Objects → Physical Drive The "Objects - PHYSICAL DRIVE SELECTION MENU" displays. Highlight the Hot Spare you
want to change and press Enter. The "Channel-n, Target-x" menu displays. Select Fail Drive. A warning message displays, and you are placed
in the "Fail Channel-n, Target-x" dialog box. If you do not want to fail the drive, select NO; you are placed back in the "Channel-n, Target-x" menu. Press Esc; you are placed back in the "Objects - PHYSICAL
DRIVE SELECTION MENU." Go to step D. If you want to fail the drive, select YES. You are placed back in the "Objects
- PHYSICAL DRIVE SELECTION MENU." Note that the drive's
state is now RDY (it is no longer a Hot Spare). Go to step D. Press Esc. You are placed in the "Objects" menu. Press Esc. You are placed in the "Management Menu." Select Configure. Select Easy Configuration. Go back to step 1 (the beginning
of Easy Configuration).
If at least one physical drive
is still available (RDY), do one of these things: If you
want to configure another array and logical drive—using the
Easy Configuration—go back to step 1. If you want to designate
a physical drive as a Hot Spare—using the Easy Configuration—go
back to step a. If you do not want to configure
anything else, press Esc. The "Logical Drives Configured" screen
displays, showing a list of all the controller's configured
logical drives (including the one you just configured). You are
placed in the "Save Configuration" dialog box.
Go to step 6.
If no physical drives are still available, press Esc. The "Logical Drives Configured" screen
displays, showing a list of all the controller's configured
logical drives (including any you just configured). You are placed
in the "Save Configuration" dialog box. Go to
step 6.
| | | |  | NOTE: You can configure a maximum of eight Hot Spares for
one HP RAID 4Si controller. | | | | |
If you do not want to save the
configuration as it is, highlight NO and press Enter. You are placed back in the "Configure" menu;
go to step 7. If you want to save the configuration as it is, highlight YES and press Enter. After the configuration for the controller has been saved,
a confirmation message displays. Press any key to continue. You
are placed back in the "Configure" menu; go to
step 7. If at least one physical drive
is still available, and you want to configure a Hot Spare or another
array and logical drive—using the Easy Configuration—select
Easy Configuration and go back to step 1. If at least one physical drive is available, but you
do not want to do any more configuration, press Esc; go to step 8. If no physical drives are available, you cannot configure
any more Hot Spares or arrays and logical drives at this point.
So, press Esc and go to step 8. Back in the "Management
Menu," press Esc. Press Esc; an exit confirmation dialog box displays. Highlight YES and press Enter; IRM ends. Make the new logical drives visible
to HP-UX, by typing this command: irdisplay -f Create the special device files—the
raw device interface (rdsk) files in the /dev/rdsk directory and the SCSI device files in the
/dev/dsk directory—for any new devices on the
system, by issuing this command: insf -e Applications use the SCSI device files to access the RAID
logical drives. For example, file systems can be mounted on the
logical drives (through SAM), or databases can be configured to
use rdsk. The naming convention for the SCSI device files is as follows: /dev/dsk/cbus_instancebtargetdLUN where bus_instance is the bus instance number for the HP-UX system. target is the same as the logical drive number. LUN is the logical unit number. Note that the LUNs are
numbered sequentially, starting with 0.
For example, /dev/dsk/c10t1d0, /dev/dsk/c2t6d0, and /dev/dsk/c8t1d0. The best way to see the mapping between logical drives and
device files is to issue this command: irdisplay Collect the configuration information
by issuing this command and sending its output to either a printer
or a file (to be printed later): irdiag -v We recommend that you always
have a hardcopy of the latest configuration—if you have
to restore the configuration for some reason, the hardcopy contains
all of the information you will need.
Using
New Configuration | |
This section describes the steps for a New Configuration. Note that these steps assume you have started
IRM and (if applicable) selected the HP RAID 4Si controller you
want to configure. Menu path: "Management
Menu" → Configure → New Configuration You are asked to confirm that you want to clear the existing configuration
before starting. Note that the information is not actually deleted
from the controller's NVRAM until you have finished configuring the
arrays and logical drives, and are at the step where you save the configuration. If you do not want to continue, highlight NO and press the Enter key; you are placed back in the "Configure" menu. If you want to continue, highlight YES and press the Enter key. The "New Configuration - ARRAY SELECTION
MENU" displays. Information Shown In the "New Configuration - ARRAY SELECTION MENU," the
physical drives that are connected to the HP RAID 4Si controller
are shown according to the controller channel they are on. The other
information shown for each physical drive is as follows: - SCSI ID (ID)
The physical drive's
SCSI ID (0 through 15). - Drive state
The physical drive's
state, which is one of these values: RDY: Ready—The drive is functioning normally
but is not part of a configured logical drive, and is not designated
as a Hot Spare. SES: A non-SCSI device—This provides enclosure services,
which gives information about temperature, power supplies, fans,
disk drive mapping, etc., for each JBOD you are using. You can use
the irdiag -v command to see the information supplied by the
SES device for your JBOD. PROC: A non-SCSI device—This is an enclosure
in SAF-TE mode. Like an SES device, it provides enclosure services, which
gives information about temperature, power supplies, fans, disk
drive mapping, etc., for each JBOD you are using. You can use the
irdiag -v command to see the information supplied by the
SAF-TE device for your JBOD.
Ensure that the physical
drives you want to configure are available (shown as RDY). If you want to do spanning:
Be sure that you have enough drives. (Remember,
RAID 1+0 requires at least four physical drives, and RAID 3+0 and
5+0 require at least six drives each.) From the available physical drives,
select the drives you want in the array. To do this, use the up
and down arrow keys to highlight a drive and then press the space
bar to select the drive. Do this for each drive you want in the
array. Note that if you select a drive by mistake, just re-highlight
the drive and press the space bar to unselect it. If you do not want to do spanning:
When you have selected all of the drives you want in the array,
press Enter and go to step 3. If you want to do spanning:
Remember that spanning means you group the disks into multiple arrays.
So, when you have selected all of the drives you want in the first array, press Enter only one time. Repeat this
step (step 2) for each array you want in the span. When you have created
all of the arrays you want in the span, check the "New Configuration
- ARRAY SELECTION MENU" to ensure that the arrays were
created. Then, go to step 3. For example, if you want to create
a RAID 1+0 configuration with 10 physical disks, create the first
array of two disks, press Enter, create the second array of two disks, press Enter, and continue until you have created the fifth array of
two disks and pressed Enter. Then, make sure the five arrays are shown on the "New Configuration
- ARRAY SELECTION MENU" (if you started with a clear configuration,
the arrays would be numbered A00, A01, A02, A03, and A04.) | | | | | TIP: As you select a physical drive, IRM assigns it an array
number/physical drive number combination. The array and physical
drive numbers are assigned sequentially, beginning with 00. For
example, if the latest array number is A04, the array number A05
is assigned to each drive as you highlight it and select it for
the next array you configure. Within that array, the first drive
you highlight and select is assigned number 00, the second drive
01, and so on until you stop selecting drives for that array. | | | | |
Press Enter to configure the array (or arrays, if you did spanning)
into a logical drive. The "Logical Drives Configured" screen,
with the "Logical Drive n" menu to the lower left, displays. The "Logical
Drives Configured" screen lists the logical drives and
this information about each drive: State, which is one of these
values: OPTIMAL—The logical drive is in good condition.
All of the configured physical disks are online. DEGRADED—The logical drive is functioning but
is not in optimal condition. One of the configured physical drives
has failed. OFFLINE—The logical drive is no longer functioning.
One or more of the configured physical drives have failed.
You are placed in the "Logical Drive n" menu. Here, you further configure the logical
drive, by using the up and down arrow keys to highlight the item
you want; press Enter to select the item. The possible values are then listed.
Use the arrow and Enter keys to select the value you want. You are then returned
to the "Logical Drive n" menu, where you can select another item,
if needed. The configuration information you can specify through the "Logical
Drive n" menu is as follows: RAID—The RAID level. Based on the number of
physical drives in the logical drive, IRM determines the default
level. Because this is a New Configuration, spanning is allowed.
So, the valid RAID levels are the following: 1
through 8 disks = RAID 0 3 through 8 disks = RAID
3 3 through 8 disks = RAID
5 4 through 10 disks (with
spanning) = RAID 1+0 (shows as RAID 1) 6 through 40 disks (with
spanning) = RAID 3+0 (shows as RAID 3) 6 through 40 disks (with
spanning) = RAID 5+0 (shows as RAID 5)
Note that if enough physical drives are in the logical drive,
you can change this value. For example, if two physical drives are
in the logical drive, IRM sets this value to 1: you can change it to 0 if you want to. However, if only one physical
drive is in the logical drive, 0 is the only acceptable value. Size—The size of the logical drive. Based
on the RAID level and the maximum number of megabytes available
from all of the physical disks in the logical drive, IRM determines
the size. Advanced Menu Menu path: "Management
Menu" → Configure → New Configuration → Logical Drive n → Advanced Menu If you select this item, you are placed in another menu (titled "Advanced")
to configure the following parameters: Stripe Size—Specify the stripe size (size of segments
written to each disk), in KB (2, 4, 8, 16, 32, 64, 128). The default
is 64. Note that we recommend you
specify 64. This is because in most cases, a 64KB stripe
size provides the best performance. Specify a different value only
if you want to test your applications' performance with
different stripe sizes. Write Policy—Either write-thru (WRTHRU) or write-back (WRBACK). In WRTHRU mode, data is written to the cache and the disk.
In WRBACK mode, data is written to only the cache; it can
be flushed out to the disk from the cache. Note that WRBACK can increase performance significantly. So, we
recommend you specify
WRBACK unless the controller's battery health
is questionable—WRBACK relies on the battery to hold data in cache if
the HP-UX system loses power (a fully charged battery holds data
for up to 72 hours). So, if you use WRBACK, be sure the battery is in good condition (
irmd will tell you if it detects a problem with the
battery). The default is WRTHRU. Read Policy—NORMAL, READAHEAD, or ADAPTIVE. NORMAL implies no read-aheads from disk are done.
READAHEAD means read ahead a full stripe from the disk.
ADAPTIVE implies read ahead a full stripe if two successive
READ calls are in the same stripe. ADAPTIVE provides the best performance, in most cases.
So, we recommend you use a different
setting only if you want to experiment to see if another setting
provides better performance. The default is ADAPTIVE. Cache Policy—Beginning with HP RAID 4Si versions B.11.00.04
(HP-UX 11.0) and B.11.11.01 (HP-UX 11i), this is always set to CachedIO, which means disk data is always cached in local
memory (that is, memory on the HP RAID 4Si controller). Note that
in earlier versions of HP RAID 4Si, Cache Policy could also be set
to DirectIO, which means that disk data (the requested amount)
is transferred directly to system memory. If you previously set
this to DirectIO (in an earlier version), and then installed one
of the above versions, this changes to CachedIO the first time you do a save of the configuration.
To accept the values specified in the "Advanced" menu,
press the Esc key to exit the menu. You are placed back in the "Logical
Drive n" menu. Span—Specifies the spanning mode (
CANSPAN or NOSPAN) of the logical drive and creates RAID levels
1+0, 3+0, or 5+0. RAID level 1+0 requires at least four physical
disks, and levels 3+0 and 5+0 require at least six physical disks. If you do not want to do spanning:
Select NOSPAN. If you want to do spanning:
Select CANSPAN. If you select CANSPAN but Span = NO still displays, you did not successfully create
more than one array in step 2 earlier. Also, to make the logical
drive spannable, you must do this step before you
accept the logical drive information (see the Accept option above).
When you have specified all of
the information on the "Logical Drive n" menu, highlight the Accept option; press Enter. If at least one physical drive is still available (RDY), you are placed back in the "New Configuration
- ARRAY SELECTION MENU." Do one of these things: If you want to configure
another array and logical drive—using the New Configuration—go
back to step 1. If you want to designate
a physical drive as a Hot Spare—using the New Configuration—go
to step 5. If you do not want to configure
anything else, press Esc. The "Logical Drives Configured" screen
displays, showing a list of all the controller's configured
logical drives (including the one you just configured). You are
placed in the "Save Configuration" dialog box. Go
to step 6.
If no physical drives are still available, the "Logical
Drives Configured" screen displays, showing a list of all
the controller's configured logical drives (including the
one you just configured). You are placed in the "Save Configuration" dialog
box. Go to step 6. If you want to designate a drive
as a Hot Spare, follow these steps: Highlight the
physical drive you want to designate as a Hot Spare and press F4. You are asked to confirm that
you want to designate that physical drive as a Hot Spare. If you do not want to make that drive a Hot Spare,
select NO. You are placed back in the "New Configuration
- ARRAY SELECTION MENU." Go to step c. If you want to make that drive a Hot Spare, select YES. You are placed back in the "New Configuration
- ARRAY SELECTION MENU." Note that the physical drive now
shows as HSP. Go to step c. | | | | | TIP: If you designate a drive as a Hot Spare (it shows as HSP), but then change your mind (and do not want it
to be a Hot Spare), you can change
it. Press Esc. You are asked to confirm whether you want to save the
configuration (which includes the Hot Spare). | | | | |
If you select NO, all of the
configuration you have done so far (or since the last time you saved
it) is lost, including the Hot Spare. You are placed back in the "Configure" menu;
select New Configuration and go back to step 1 (the beginning of New Configuration). If you select YES, the configuration is saved (including the Hot
Spare). But, you can still change the Hot Spare back to a "regular" physical drive,
by following these steps: Menu
Path: "Management Menu" →
Objects → Physical Drive The "Objects - PHYSICAL DRIVE SELECTION MENU" displays. Highlight the Hot Spare you
want to change and press Enter. The "Channel-n, Target-x" menu displays. Select Fail Drive. A warning message displays, and you are placed
in the "Fail Channel-n, Target-x" dialog box. If you do not want to fail the drive, select NO; you are placed back in the "Channel-n, Target-x" menu. Press Esc; you are placed in the "Objects - PHYSICAL DRIVE
SELECTION MENU." Go to step D. If you want to fail the drive, select YES. You are placed back in the "Objects
- PHYSICAL DRIVE SELECTION MENU." Note that the drive's
state is now RDY (it is no longer a Hot Spare). Go to step D. Press Esc. You are placed in the "Objects" menu. Press Esc. You are placed in the "Management Menu." Select Configure. Select New Configuration. Go back to step 1 (the beginning
of New Configuration).
If at least one physical drive
is still available (RDY), do one of these things: If you
want to configure another array and logical drive—using the
New Configuration—go back to step 1. If you want to designate
a physical drive as a Hot Spare—using the New Configuration—go
back to step a. If you do not want to configure
anything else, press Esc. The "Logical Drives Configured" screen
displays, showing a list of all the controller's configured
logical drives (including the one you just configured). You are
placed in the "Save Configuration" dialog box.
Go to step 6.
If no physical drives are still available, press Esc. The "Logical Drives Configured" screen
displays, showing a list of all the controller's configured
logical drives (including any you just configured). You are placed
in the "Save Configuration" dialog box. Go to
step 6.
| | | | | NOTE: You can configure a maximum of eight Hot Spares for
one HP RAID 4Si controller. | | | | |
If you do not want to save the
configuration as it is, highlight NO and press Enter. You are placed back in the "Configure" menu;
go to step 7. If you want to save the configuration as it is, highlight YES and press Enter. After the configuration for the controller has been saved,
a confirmation message displays. Press any key to continue. You
are placed back in the "Configure" menu; go to
step 7. If at least one physical drive
is still available, and you want to configure a Hot Spare or another
array and logical drive—using the New Configuration—select
New Configuration and go back to step 1. If at least one physical drive is available, but you
do not want to do any more configuration, press Esc; go to step 8. If no physical drives are available, you cannot configure
any more Hot Spares or arrays and logical drives at this point.
So, press Esc and go to step 8. Back in the "Management
Menu," press Esc. Press Esc; an exit confirmation dialog box displays. Highlight YES and press Enter; IRM ends. Make the new logical drives visible
to HP-UX, by typing this command: irdisplay -f Create the special device files—the
raw device interface (rdsk) files in the /dev/rdsk directory and the SCSI device files in the
/dev/dsk directory—for any new devices on the
system, by issuing this command: insf -e Applications use the SCSI device files to access the RAID
logical drives. For example, file systems can be mounted on the
logical drives (through SAM), or databases can be configured to
use rdsk. The naming convention for the SCSI device files is as follows: /dev/dsk/cbus_instancebtargetdLUN where bus_instance is the bus instance number for the HP-UX system. target is the same as the logical drive number. Note that
the LUNs are numbered sequentially, starting with 0. LUN is the logical unit number.
For example, /dev/dsk/c10t1d0, /dev/dsk/c2t6d0, and /dev/dsk/c8t1d0. The best way to see the mapping between logical drives and
device files is to issue this command: irdisplay Collect the configuration information
by issuing this command and sending its output to either a printer
or a file (to be printed later): irdiag -v We recommend that you always
have a hardcopy of the latest configuration—if you have
to restore the configuration for some reason, the hardcopy contains
all of the information you will need.
Using
View/Add Configuration | |
This section describes the steps for a View/Add Configuration. Note that these steps assume you have started
IRM and (if applicable) selected the HP RAID 4Si controller you
want to configure. Menu path: "Management
Menu" → Configure → View/Add Configuration The "View/Add Configuration - ARRAY SELECTION MENU" displays. Information Shown In the "View/Add Configuration - ARRAY SELECTION
MENU," the physical drives that are connected to the HP
RAID 4Si controller are shown according to the controller channel
they are on. The other information shown for each physical drive
is as follows: - SCSI
ID (ID)
The physical drive's
SCSI ID (0 through 15). - Drive state
The physical drive's
state, which is one of these values: RDY: Ready—The drive is functioning normally
but is not part of a configured logical drive, and is not designated
as a Hot Spare. ONL: Online—The drive is functioning normally and
is part of a configured logical drive. RBLD: Rebuild—The drive is being rebuilt with
data from a failed drive. HSP: Hot Spare—The drive is functioning normally and
is designated as a Hot Spare drive for the controller, to be used
if an online drive fails. Note that this can also be referred to
as a Global Hot Spare (GHS). FAIL: Failed—A fault has occurred in the drive, placing
the drive out of service. SES: A non-SCSI device—This provides enclosure services,
which gives information about temperature, power supplies, fans,
disk drive mapping, etc., for each JBOD you are using. You can use
the irdiag -v command to see the information supplied by the
SES device for your JBOD. PROC: A non-SCSI device—This is an enclosure
in SAF-TE mode. Like an SES device, it provides enclosure services, which
gives information about temperature, power supplies, fans, disk
drive mapping, etc., for each JBOD you are using. You can use the
irdiag -v command to see the information supplied by the
SAF-TE device for your JBOD.
- Array
The array number (
Ann) and the physical drive's number within
the array (0x). For example, A00-01 means array A00, physical drive 01. Note that
this information is displayed for only a physical drive that has
been configured in an array.
Ensure that the physical
drives you want to configure are available (shown as RDY). If you want to do spanning:
Be sure that you have enough drives. (Remember,
RAID 1+0 requires at least four physical drives, and RAID 3+0 and
5+0 require at least six drives each.) From the available physical drives,
select the drives you want in the array. To do this, use the up
and down arrow keys to highlight a drive and then press the space
bar to select the drive. Do this for each drive you want in the
array. Note that if you select a drive by mistake, just re-highlight
the drive and press the space bar to unselect it. If you do not want to do spanning:
When you have selected all of the drives you want in the array,
press Enter and go to step 3. If you want to do spanning:
Remember that spanning means you group the disks into multiple arrays.
So, when you have selected all of the drives you want in the first array, press Enter only one time. Repeat this
step (step 2) for each array you want in the span. When you have created
all of the arrays you want in the span, check the "View/Add Configuration
- ARRAY SELECTION MENU" to ensure that the arrays were
created. Then, go to step 3. For example, if you want to create
a RAID 1+0 configuration with 10 physical disks, create the first
array of two disks, press Enter, create the second array of two disks, press Enter, and continue until you have created the fifth array of
two disks and pressed Enter. Then, make sure the five arrays are shown on the "View/Add
Configuration - ARRAY SELECTION MENU" (if you started with
a clear configuration, the arrays are numbered A00, A01, A02, A03, and
A04.) | | | | | TIP: As you select a physical drive, IRM assigns it an array
number/physical drive number combination. The array and physical
drive numbers are assigned sequentially, beginning with 00. For
example, if the latest array number is A04, the array number A05
is assigned to each drive as you highlight it and select it for
the next array you configure. Within that array, the first drive
you highlight and select is assigned number 00, the second drive
01, and so on until you stop selecting drives for that array. | | | | |
Press Enter to configure the array (or arrays, if you did spanning)
into a logical drive. The "Logical Drives Configured" screen,
with the "Logical Drive n" menu to the lower left, displays. The "Logical
Drives Configured" screen lists the logical drives and
this information about each drive: State, which is one of these
values: OPTIMAL—The logical drive is in good condition.
All of the configured physical disks are online. DEGRADED—The logical drive is functioning but
is not in optimal condition. One of the configured physical drives
has failed. OFFLINE—The logical drive is no longer functioning.
One or more of the configured physical drives have failed.
You are placed in the "Logical Drive n" menu. Here, you further configure the logical
drive, by using the up and down arrow keys to highlight the item
you want; press Enter to select the item. The possible values are then listed.
Use the arrow and Enter keys to select the value you want. You are then returned
to the "Logical Drive n" menu, where you can select another item,
if needed. The configuration information you can specify through the "Logical
Drive n" menu is as follows: RAID—The RAID level. Based on the number of
physical drives in the logical drive, IRM determines the default
level. The valid RAID levels are the following: 1
through 8 disks = RAID 0 3 through 8 disks = RAID
3 3 through 8 disks = RAID
5 4 through 10 disks (with
spanning) = RAID 1+0 (shows as RAID 1) 6 through 40 disks (with
spanning) = RAID 3+0 (shows as RAID 3) 6 through 40 disks (with
spanning) = RAID 5+0 (shows as RAID 5)
Note that if enough physical drives are in the logical drive,
you can change this value. For example, if two physical drives are
in the logical drive, IRM sets this value to 1: you can change it to 0 if you want to. However, if only one physical
drive is in the logical drive, 0 is the only acceptable value. Size—The size of the logical drive. Based
on the RAID level and the maximum number of megabytes available
from all of the physical disks in the logical drive, IRM determines
the size. Advanced Menu Menu path: "Management
Menu" → Configure → View/Add Configuration → Logical Drive n →
Advanced Menu If you select this item, you are placed in another menu (titled "Advanced")
to configure the following parameters: Stripe Size—Specify the stripe size (size of segments
written to each disk), in KB (2, 4, 8, 16, 32, 64, 128). The default
is 64. Note that we recommend you
specify 64. This is because in most cases, a 64KB stripe
size provides the best performance. Specify a different value only
if you want to test your applications' performance with
different stripe sizes. Write Policy—Either write-thru (WRTHRU) or write-back (WRBACK). In WRTHRU mode, data is written to the cache and the disk.
In WRBACK mode, data is written to only the cache; it can
be flushed out to the disk from the cache. Note that WRBACK can increase performance significantly. So, we
recommend you specify
WRBACK unless the controller's battery health
is questionable—WRBACK relies on the battery to hold data in cache if
the HP-UX system loses power (a fully charged battery holds data
for up to 72 hours). So, if you use WRBACK, be sure the battery is in good condition (
irmd will tell you if it detects a problem with the
battery). The default is WRTHRU. Read Policy—NORMAL, READAHEAD, or ADAPTIVE. NORMAL implies no read-aheads from disk are done.
READAHEAD means read ahead a full stripe from the disk.
ADAPTIVE implies read ahead a full stripe if two successive
READ calls are in the same stripe. ADAPTIVE provides the best performance, in most cases.
So, we recommend you use a different
setting only if you want to experiment to see if another setting
provides better performance. The default is ADAPTIVE. Cache Policy—Beginning with HP RAID 4Si versions B.11.00.04
(HP-UX 11.0) and B.11.11.01 (HP-UX 11i), this is always set to CachedIO, which means disk data is always cached in local
memory (that is, memory on the HP RAID 4Si controller). Note that
in earlier versions of HP RAID 4Si, Cache Policy could also be set
to DirectIO, which means that disk data (the requested amount)
is transferred directly to system memory. If you previously set
this to DirectIO (in an earlier version), and then installed one
of the above versions, this changes to CachedIO the first time you do a save of the configuration.
To accept the values specified in the "Advanced" menu,
press the Esc key to exit the menu. You are placed back in the "Logical
Drive n" menu. Span—Specifies the spanning mode (
CANSPAN or NOSPAN) of the logical drive and creates RAID levels
1+0, 3+0, or 5+0. RAID level 1+0 requires at least four physical
disks, and levels 3+0 and 5+0 require at least six physical disks. If you do not want to do spanning:
Select NOSPAN. If you want to do spanning:
Select CANSPAN. If you select CANSPAN but Span = NO still displays, you did not successfully create
more than one array in step 2 earlier. Also, to make the logical
drive spannable, you must do this step before you
accept the logical drive information (see the Accept option above).
When you have specified all of
the information on the "Logical Drive n" menu, highlight the Accept option; press Enter. If at least one physical drive is still available (RDY), you are placed back in the "View/Add
Configuration - ARRAY SELECTION MENU." Do one of these
things: If you
want to configure another array and logical drive—using
the View/Add Configuration—go back to step 1. If you want to designate
a physical drive as a Hot Spare—using the View/Add Configuration—go
to step 5. If you do not want to configure
anything else, press Esc. The "Logical Drives Configured" screen
displays, showing a list of all the controller's configured
logical drives (including the one you just configured). You are
placed in the "Save Configuration" dialog box. Go
to step 6.
If no physical drives are still available, the "Logical
Drives Configured" screen displays, showing a list of all
the controller's configured logical drives (including the
one you just configured). You are placed in the "Save Configuration" dialog
box. Go to step 6. If you want to designate a drive
as a Hot Spare, follow these steps: Highlight the
physical drive you want to designate as a Hot Spare and press F4. You are asked to confirm that
you want to designate that physical drive as a Hot Spare. If you do not want to make that drive a Hot Spare,
select NO. You are placed back in the "View/Add
Configuration - ARRAY SELECTION MENU." Go to step c. If you want to make that drive a Hot Spare, select YES. You are placed back in the "View/Add
Configuration - ARRAY SELECTION MENU." Note that the physical
drive now shows as HSP. Go to step c. | | | | | TIP: If you designate a drive as a Hot Spare (it shows as HSP), but then change your mind (and do not want it
to be a Hot Spare), you can change
it. Press Esc. You are asked to confirm whether you want to save the
configuration (which includes the Hot Spare). | | | | |
If you select NO, all of the
configuration you have done so far (or since the last time you saved
it) is lost, including the Hot Spare. You are placed back in the "Configure" menu;
select View/Add Configuration and go back to step 1 (the beginning of View/Add Configuration). If you select YES, the configuration is saved (including the Hot
Spare). But, you can still change the Hot Spare back to a "regular" physical drive,
by following these steps: Menu
Path: "Management Menu" →
Objects → Physical Drive The "Objects - PHYSICAL DRIVE SELECTION MENU" displays. Highlight the Hot Spare you
want to change and press Enter. The "Channel-n, Target-x" menu displays. Select Fail Drive. A warning message displays, and you are placed
in the "Fail Channel-n, Target-x" dialog box. If you do not want to fail the drive, select NO; you are placed back in the "Channel-n, Target-x" menu. Press Esc; you are placed in the "Objects - PHYSICAL DRIVE
SELECTION MENU." Go to step D. If you want to fail the drive, select YES. You are placed back in the "Objects
- PHYSICAL DRIVE SELECTION MENU." Note that the drive's
state is now RDY (it is no longer a Hot Spare). Go to step D. Press Esc. You are placed in the "Objects" menu. Press Esc. You are placed in the "Management Menu." Select Configure. Select View/Add Configuration. Go back to step 1 (the beginning
of View/Add Configuration).
If at least one physical drive
is still available (RDY), do one of these things: If you
want to configure another array and logical drive—using the
View/Add Configuration—go back to step 1. If you want to designate
a physical drive as a Hot Spare—using the View/Add Configuration—go
back to step a. If you do not want to configure
anything else, press Esc. The "Logical Drives Configured" screen
displays, showing a list of all the controller's configured
logical drives (including the one you just configured). You are
placed in the "Save Configuration" dialog box.
Go to step 6.
If no physical drives are still available, press Esc. The "Logical Drives Configured" screen
displays, showing a list of all the controller's configured
logical drives (including any you just configured). You are placed
in the "Save Configuration" dialog box. Go to
step 6.
| | | | | NOTE: You can configure a maximum of eight Hot Spares for
one HP RAID 4Si controller. | | | | |
If you do not want to save the
configuration as it is, highlight NO and press Enter. You are placed back in the "Configure" menu;
go to step 7. If you want to save the configuration as it is, highlight YES and press Enter. After the configuration for the controller has been saved,
a confirmation message displays. Press any key to continue. You
are placed back in the "Configure" menu; go to
step 7. If at least one physical drive
is still available, and you want to configure a Hot Spare or another
array and logical drive—using the View/Add Configuration—select
View/Add Configuration and go back to step 1. If at least one physical drive is available, but you
do not want to do any more configuration, press Esc; go to step 8. If no physical drives are available, you cannot configure
any more Hot Spares or arrays and logical drives at this point.
So, press Esc and go to step 8. Back in the "Management
Menu," press Esc. Press Esc; an exit confirmation dialog box displays. Highlight YES and press Enter; IRM ends. Make the new logical drives visible
to HP-UX, by typing this command: irdisplay -f Create the special device files—the
raw device interface (rdsk) files in the /dev/rdsk directory and the SCSI device files in the
/dev/dsk directory—for any new devices on the
system, by issuing this command: insf -e Applications use the SCSI device files to access the RAID
logical drives. For example, file systems can be mounted on the
logical drives (through SAM), or databases can be configured to
use rdsk. The naming convention for the SCSI device files is as follows: /dev/dsk/cbus_instancebtargetdLUN where bus_instance is the bus instance number for the HP-UX system. target is the same as the logical drive number. LUN is the logical unit number. Note that the LUNs are
numbered sequentially, starting with 0.
For example, /dev/dsk/c10t1d0, /dev/dsk/c2t6d0, and /dev/dsk/c8t1d0. The best way to see the mapping between logical drives and
device files is to issue this command: irdisplay Collect the configuration information
by issuing this command and sending its output to either a printer
or a file (to be printed later): irdiag -v We recommend that you always
have a hardcopy of the latest configuration—if you have
to restore the configuration for some reason, the hardcopy contains
all of the information you will need.
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