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Full Discussion: Changing AIX LUN paths
Operating Systems AIX Changing AIX LUN paths Post 302994206 by agent.kgb on Monday 20th of March 2017 11:38:09 AM
Old 03-20-2017
Quote:
Originally Posted by bbbngowc
Hello,
I'm thinking this can be done in this order:
  1. unmount the filesystems
  2. varyoffvg vg
  3. make the changes on the storage system (EMC)
  4. cfgmgr
  5. varyonvg vg
  6. mount the filesystems
I don't know this side of EMC, but let's assume, that nothing will be changed on the underlying device during changing the connection type, then you need several additional steps:

-1. make backup
0. notice all PVIDs of all disks, you have
2.5. exportvg all volume groups, rmdev all the disks, you plan to change
4.5. make sure, that you see the same PVIDs on the new disks. If you don't - go back and doesn't try to do anything further.
5. importvg all the volume groups, you exported before.

It could be also good to notice VG major numbers. Sometimes they are useful.
 

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vgrestore(1M)															     vgrestore(1M)

NAME
vgrestore - restore a VxVM disk group back to an LVM volume group SYNOPSIS
/etc/vx/bin/vgrestore vg_name DESCRIPTION
The vgrestore command restores a Logical Volume Manager (LVM) volume group that was previously converted to a VxVM disk group by the vxvm- convert utility. ARGUMENTS
vg_name Specifies the name of a volume group that was converted to a VxVM disk group by the vxvmconvert utility. EXIT CODES
vgrestore exits with one of the following values: 0 Successful completion. >0 Failure; an error occurred. WARNINGS
vgrestore functions only on VxVM disk groups that were converted from LVM volume groups by the vxvmconvert command. It is a good idea to back up user data before running vgrestore, and restore it after the vgrestore completes, as vgrestore can only restore a logical volume back to the state it was in before conversion to VxVM. If data changed on the volume while it was a VxVM volume, the changes won't be reflected on the volume after being restored to LVM. As part of the original conversion process, applications that once referenced the now-converted LVM volume's path names may have changed to reference VxVM volume special device file names. Alternatively, special device file path names originally representing the now-converted LVM volumes may have changed to symbolic links pointing to the VxVM volume path names. Be sure to undo these actions when restoring back to LVM. Do not use vgrestore unless you are certain that you want to restore LVM volume groups. After vgrestore this is run, the VxVM disks will no longer exist. EXAMPLES
To restore the LVM volume group vg03 that was converted by vxvmconvert to the VxVM disk group dg03, enter: vgcfgrestore vg03 SEE ALSO
vxvmconvert(1M) Veritas Volume Manager Migration Guide VxVM 5.0.31.1 24 Mar 2008 vgrestore(1M)
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