Magneto-Optical Disk Library Configuration Guidelines

On your host computer system, invoke /usr/sbin/ioscan -fn to figure out what addresses are available on the SCSI interface to which you'll be attaching the optical disk library.

Observe the following single-ended SCSI guidelines:

Using the hardware documentation as your primary source:

Consult Table 5-3 “Magneto-Optical Disk Library Configuration Requirements” to determine the device drivers needed for your magneto-optical disk library and interface. If any necessary static device driver is absent from the kernel, you will need to rebuild the kernel to include it. Here is how to do so:

1. Change directory to the build environment (/stand/build). Execute a system preparation script, system_prep, which extracts the system file from the current kernel and writes a system file in your current directory. (That is, it creates /stand/build/system.) The -v gives verbose explanation as the script executes.

   cd /stand/build /usr/lbin/sysadm/system_prep -v -s system

2. Modify the /stand/build/system file to add the absent driver(s) by invoking the kmsystem command. The -c Y specifies that driver-name is to be configured into the system.

   /usr/sbin/kmsystem -S /stand/build/system -c Y driver-name

   	NOTE: To avoid introducing format errors, do not edit the HP-UX system description files directly. Instead, use the commands kmsystem and kmtune. These commands are new for Release 11.0; consult kmsystem(1M) and kmtune(1M) in the HP-UX Reference.

3. Build the new kernel by invoking the mk_kernel command. This creates /stand/build/vmunix_test, a kernel ready for testing.

   /usr/sbin/mk_kernel -s /stand/build/system

4. Save the old system file by moving it. Then move the new system file into place.

   mv /stand/system /stand/system.prev mv /stand/build/system /stand/system

5. Prepare for rebooting by invoking the kmupdate command. This sets a flag that tells the system to use the new kernel when it restarts.

   /usr/sbin/kmupdate

Notify users that the system will be shut down to configure the optical disk library. You can use the wall command and/or the interactive capabilities of the shutdown command to broadcast a message to users before the system goes down. (See wall(1M) or shutdown(1M) in the HP-UX Reference.)

Bring the system down to a halt using the shutdown command.

Turn off the power to all peripheral devices and then to the SPU.

Attach the optical disk library to the host computer system, following the instructions and using the cabling recommended in the hardware documentation. Make sure the last device in the SCSI chain is terminated.

Turn on the power to all peripheral devices, including the optical disk library. Wait for the peripheral devices to become ready, then turn on power to the SPU.

On booting up, HP-UX detects the optical disk library and associates it with its device drivers. insf creates the character and block device special (/dev) files required to communicate with each disk surface in the optical disk library. By default, insf creates device special files for 32 optical disks (64 device special files for the surfaces plus a device special file for the autochanger).

If you are configuring a larger-capacity magneto-optical library system, you will need to create device files for the remaining slots. To do so, execute the following command:

/usr/sbin/insf -e -p <first_optical disk:last_optical disk> -H <H/W_path>

Verify the configuration by invoking the ioscan command on the address to which the disk library was configured.

As shown in excerpted output run on a Series 700, a magneto-optical autochanger displays two entries — one for the autochanger mechanism (in this case, C1708C) and one for the disk mechanism (C1716C) — each with its own set of block and character device special files.

/usr/sbin/ioscan -H 2/0/1 -fn
Class     I  H/W Path   Driver      S/W State   H/W Type     Description
=========================================================================
...
ext_bus   0  2/0/1      c700        CLAIMED     INTERFACE    Built-in SCSI
target    2  2/0/1.0    target      CLAIMED     DEVICE
autoch    0  2/0/1.0.0  schgr       CLAIMED     DEVICE       HP      C1708C
                       /dev/ac/c0t0d0_10a   /dev/rac/c0t0d0_10a
                       /dev/ac/c0t0d0_10b   /dev/rac/c0t0d0_10b
                       /dev/ac/c0t0d0_11a   /dev/rac/c0t0d0_11a
                       /dev/ac/c0t0d0_11b   /dev/rac/c0t0d0_11b
                       /dev/ac/c0t0d0_12a   /dev/rac/c0t0d0_12a
                           ...
                       /dev/ac/c0t0d0_31b   /dev/rac/c0t0d0_31b
                       /dev/ac/c0t0d0_32a   /dev/rac/c0t0d0_32a
                       /dev/ac/c0t0d0_32b   /dev/rac/c0t0d0_32b
                       /dev/rac/c0t0d0
 
/usr/sbin/ioscan -H 2/0/1.1.0 -fn
Class     I  H/W Path   Driver      S/W State   H/W Type     Description
=========================================================================
disk      0  2/0/1.1.0  sdisk       CLAIMED     DEVICE       HP      C1716C
                       /dev/dsk/c0t1d0     /dev/rdsk/c0t1d0
...