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216 Configuring the PID format

17. If you are not using multipathing software, mount all devices again and restart I/O. For example:

mount /mnt/jbod

18.If you are using multipathing software, reenable the affected path. The preceding steps do not clean

up the results from ioscan. When viewing the output of ioscan, notice the that the original entry is still

there, but now has a status of NO_HW.

19. To remove the original (outdated) entry, use the rmsf (remove special file) command. The format for

this command is rmsf –a –v path_to_device. For example:

rmsf –a –v /dev/dsk/c65t8d0

20.Validate that the entry has been removed by issuing the ioscan –funC disk command. In the

following example, the NO_HW entry is no longer listed:

21.Repeat for all fabrics.

22.Issue the switchEnable command. Enable the core switches first, then the edges.

AIX procedure

This procedure is not intended to be comprehensive. It provides a starting point from which a SAN

administrator can develop a site-specific procedure for a device that binds automatically by PID, and

cannot be rebooted due to uptime requirements.

1. Backup all data. Verify backups.

2. If you are not using multipathing software, stop all I/O going to all volumes connected through the

switch or fabric to be updated.

3. If you are not using multipathing software, varyoff the volume groups. The command format is

varyoffvg volume_group_name. For example:

varyoffvg datavg

4. If you are not using multipathing software, unmount the volumes from their mount points using umount.

The command format is umount mount_point. For example:

umount /mnt/jbod

5. If you are using multipathing software, use that software to remove one fabric’s devices from its

configuration.

# ioscan -funC disk

Class I H/W Path Driver S/W State H/W Type Description

-------------------------------------------------------------------------------------

disk 0 0/0/1/1.2.0 adisk CLAIMED DEVICE SEAGATE ST39204LC

/dev/dsk/clt2d0 /dev/rdsk/c1t2d0

disk 1 0/0/2/1.2.0 adisk CLAIMED DEVICE HP DVD-ROM 304

/dev/dsk/c3t2d0 /dev/rdsk/c3t2d0

disk 319 0/4/0/0.1.2.255.14.8.0 adisk CLAIMED DEVICE SEAGATE ST336605FC

/dev/dsk/c64t8d0 /dev/rdsk/c64t8d0

disk 320 0/4/0/0.1.18.255.14.8.0 adisk NO_HW DEVICE SEAGATE ST336605FC

/dev/dsk/c65t8d0 /dev/rdsk/c65t8d0

het46 (HP-50001)> ioscan -funC disk