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You can create the following dynamic volumes: Procedure 4-1 To
create a dynamic volume Right-click a dynamic disk group in the tree view the
right pane, and select New Volume from the context menu. The Create Volume wizard appears. You can also select the command from the Actions menu or click
the New Volume tool on the toolbar (the third tool from the left side
of the toolbar). Click Next to continue. The screen for selecting attributes comes up next. Your screen
should be similar to the sample screen that follows. If necessary, select the dynamic Group name for the
volume from the pull-down list. Type in the Volume Name. This is a Volume Manager-specific
name that is used in some Volume Manager commands. It is different
from the volume label for the file system. Specify the volume size, or select Maxsize. Select the volume type: Make your selections in the Select disks for use for
volume screen. The default setting is for Volume Manager to assign the disks
for you. To manually select the disks, click the "Manually
select disks to create volume" radio button. The disks
that you select should be in the right pane when you click Next. | | | |  | NOTE: If you select disks manually, you can specify that the
volume is to be mirrored or striped across controllers, trays, targets,
or enclosures. You can also select ordered allocation. Ordered allocation
uses the specified storage to first concatenate disks, then to form
columns, and finally to form mirrors. | | | | |
Check your selections in the final screen. When you
are satisfied with your choices, click Finish. By clicking the Previous button, you can go back and make changes before you
click Finish.
Concatenated | |
A concatenated volume consists of one or more regions of the
specified disks. You have the option of placing a file system on
the new volume or mirroring the volume. You can create a regular
concatenated volume or a concatenated pro volume. A concatenated
pro volume is layered and mirrored. Layout: | Choose Concatenated or Concatenated Pro
for the volume layout. | Options: | To mirror the
volume, select Mirrored. In the Total Number of Mirrors field, enter the total
number of mirrors for the volume.
| | | | | NOTE: Concatenated pro volumes are mirrored by default. To enable
logging for a mirrored volume, select Enable Logging. | | | | |
To place
a file system on the volume, click Create a file system and specify the file system type and mount point in
the New File System dialog box. To clear the volume before enabling it for general use,
select Initialize Zero. To prevent the creation of a layered volume, select No Layered Volumes. In cases where a layered volume layout is appropriate,
VxVM can create a layered volume when a non-layered layout is specified.
This option ensures that the volume has a non-layered layout. If
a layered (Pro) layout is selected, this option is ignored.
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Striped | |
A striped volume spreads across two or more disks. You have
the option of placing a file system on the new volume or mirroring
the volume. You can create a regular striped volume or a striped
pro volume. A striped pro volume is layered and mirrored. Layout: | Choose Striped or Striped Pro for the volume layout. In the Number of
Columns field, specify the number of columns (disks) across which
the volume should be striped. A striped volume requires at least
two disks. To specify a stripe unit size other than
the default, enter the stripe unit size in the Stripe Unit Size
field. To specify a size unit, attach an s (sectors), k (kilobytes),
m (megabytes), or g (gigabytes) to the size. | Options: | To mirror the
volume, select Mirrored. In the Total Number of Mirrors field, enter the total
number of mirrors for the volume.
| | | | | NOTE: Striped pro volumes are mirrored by default.To enable logging
for a mirrored volume, select Enable Logging. | | | | |
To place
a file system on the volume, click Create a file system and specify the file system type and mount point in
the New File System dialog box. To clear the volume before enabling it for general use,
select Initialize Zero. To prevent the creation of a layered volume, select No Layered Volumes. In cases where a layered volume layout is appropriate,
VxVM can create a layered volume when a non-layered layout is specified.
This option ensures that the volume has a non-layered layout. If
a layered (Pro) layout is selected, this option is ignored.
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| | | | | NOTE: A striped volume requires at least
two disks. If no disks are assigned, VxVM uses available space
on disks in the selected disk group. The data in a striped volume is not protected against
disk failure unless the volume is mirrored. At least one additional
disk is required to mirror a striped volume. Striped pro volumes are mirrored by default, so
a striped pro volume requires more disks than an unmirrored striped
volume. If your system supports root volumes, then it should
be noted that you cannot use a striped pro volume for a root volume. You cannot use a striped pro volume for a swap volume. If a file system is placed on the volume and the Mount at Boot option is selected, the
file system table file is automatically updated.
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RAID-5 | |
A RAID-5 volume spreads across two or more disks, and contains
parity information. You have the option of placing a file system
on the new volume. Layout: | Choose RAID-5 for the volume layout. In the Number of
Columns field, specify the number of columns (disks) across which
the volume should be striped. A RAID-5 volume requires at least
three disks (or four disks if logging is enabled). To
specify a stripe unit size other than the default, enter the stripe
unit size in the Stripe Unit Size field. To specify a size unit,
attach an s (sectors), k (kilobytes), m (megabytes), or g (gigabytes)
to the size. | Options: | To place a file
system on the volume, click Create a file system and specify the file system type and mount point in
the New File System dialog box. To enable RAID-5 logging for the volume, select Enable Logging. VxVM adds an appropriate number of logs to the volume. To clear the volume before enabling it for general use,
select Initialize Zero.
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Mirrored | |
A concatenated or striped volume is mirrored (copied) on at
least one other disk. If one of the disks fails, data on the volume
can be accessed from the surviving disks. Concatenated pro and striped
pro volumes are layered and mirrored by default. Layout: | Choose Concatenated, Striped, Concatenated Pro, or Striped Pro for the volume layout. For a striped or
striped pro volume, provide the following information: In the Number of Columns field, specify the number of
columns (disks) across which the volume should be striped. A striped
volume requires at least two disks. To specify a stripe unit size other than the default, enter
the stripe unit size in the Stripe Unit Size field. To specify a
size unit, attach an s (sectors), k (kilobytes), m (megabytes),
or g (gigabytes) to the size.
| Mirror Info: | Select Mirrored. In the Total Number of Mirrors field, enter the total
number of mirrors for the volume. | Options: | To place a file
system on the volume, click Create a file system and specify the file system type and mount point in
the New File System dialog box. To enable Dirty Region Logging (DRL) for the volume,
select Enable Logging. VxVM adds an appropriate number of logs to the volume. To clear the volume before enabling it for general use,
select Initialize Zero. To prevent the creation of a layered volume, select No Layered Volumes. In cases where a layered volume layout is appropriate,
VxVM can create a layered volume when a non-layered layout is specified.
This option ensures that the volume has a non-layered layout. If
a layered (Pro) layout is selected, this option is ignored.
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