Technical data

A-18 Fabric OS Administrator’s Guide
Publication Number: 53-0000518-09
Performing PID Format Changes
A
20. Validate that the entry has been removed by using the command ioscan –funC disk. In this
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 usage 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 usage 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.
6. Remove the device entries for the fabric you are migrating. For example, if the HBA for that fabric
is fcs0, execute the command:
rmdev -Rdl fcs0
7. Connect to each switch in the fabric.
8. Issue the switchDisable command.
9. Issue the configure command and change the Core Switch PID Format to 1.
10. Issue the configEnable [effective_zone_configuration] command. For example:
configenable my_config
11. Issue the switchEnable command. Enable the core switches first, then the edges.
12. Rebuild the device entries for the affected fabric using the cfgMgr command. For example:
cfgmgr –v
het46 (HP-50001)> 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