First some history; we have a customer that will be implementing
Clustering between 2 physical system that will share some storage on a SAN. One
system was already running RHEL 5.8 32-bit and they are upgrading to RHEL 6.3
64-bit over all. So on the second system a RHEL 6.3 64-bit KickStart provided
by us was installed. Our instructions stated to disconnect the system from the
SAN before doing the KickStart, but they did not. The system has local storage
for the OS and the OS was installed on it as it should have been. But because
the SAN was connected and the LUNs zoned to the system, the KickStart
identified the multiple paths to the LUNs and enabled multipathd, ran pvcreate
on the /dev/mapper/mpath* names which over wrote the existing header/labels on
each LUN and put new uuid on each and cleared the LVM label information. On the
system running RHEL 5.8 the VG and the LV could still be access but all command
such as lvs, pvs and vgs would not show information because of the missing LVM
labels.
We had to reboot the active system and then run pvcreate with the -uuid
option to put the correct uuid back in place on each LUN, there were 16 of
them. And then run vgcfgrestore on the VG and everything is fine now.
Once the RHEL 6.3 64-bit system is working properly the RHEL 5.8 32-bit
system will be brought down and the SAN storage will be accessed from the RHEL
6.3 64-bit system. Then the RHEL 6.3 64-bit KickStart will be run on the old
RHEL 5.8 32-bit system to upgrade it, which means both systems will be running
RHEL 6.3 64-bit and the Cluster software will be activated.
So what option or whatever can be specified in the KickStart to not
automatically scan for SAN storage and enable multipathd and run pvcreate?
-------------------------
Jackson C. Allen
McKesson Provider Technologies
5995 Windward Parkway
Alpharetta, GA 30005
(404) 338-2023
[email protected]<mailto:[email protected]>
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