Technical data

A-16 Fabric OS Administrator’s Guide
Publication Number: 53-0000518-09
Performing PID Format Changes
A
Example
10. After all switches are updated to use the new PID format and reenabled, verify that the fabric has
fully reconverged (each switch “sees” the other switches).
11. Enter cfgEnable [active_zoning_config] on one of the switches in the fabric to update zoning to
use the new PID form.
This does not change the definition of zones in the fabric, but merely causes the lowest level tables
in the zoning database to be updated with the new PID format setting. It is only necessary to do this
once per fabric; the zoning update automatically propagates to all switches.
At this point, all switches in the fabric are operating in the new addressing mode.
HP/UX Procedure
This procedure is not intended to be comprehensive. It provides a starting point from which a SAN
administrator could 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/fabric to be updated.
3. If you are not using multipathing software, unmount the volumes from their mount points using
umount. The proper usage would be umount <mount_point>. For example:
umount /mnt/jbod
4. If you are using multipathing software, use that software to remove one fabric’s devices from its
configuration.
5. Deactivate the appropriate volume groups using vgchange. The proper usage would be
vgchange –a n <path_to_volume_group>. For example:
vgchange –a n /dev/jbod
6. Make a backup copy of the volume group directory using tar from within /dev. For example:
tar –cf /tmp/jbod.tar jbod
switch:admin> switchdisable
switch:admin> configure
Configure...
Fabric parameters (yes, y, no, n): [no] yes
Domain: (1..239) [1]
R_A_TOV: (4000..120000) [10000]
E_D_TOV: (1000..5000) [2000]
Data field size: (256..2112) [2112]
Sequence Level Switching: (0..1) [0]
Disable Device Probing: (0..1) [0]
Suppress Class F Traffic: (0..1) [0]
SYNC IO mode: (0..1) [0]
Core Switch PID Format: (0..2) [0] 1
Per-frame Route Priority: (0..1) [0]
Long Distance Fabric: (0..1) [0]
BB credit: (1..27) [16]