Cheking that PVLINKS configured correctly

[farid S]

Hi,
I had one xp128 connected to 2 superdomes which are running an "SG/oracle Rac" cluster. the paltform was formerly configured and monitored by another Admin. Now, I need to do some maintenance on one of the redundant SAN switches which induce down time. I need to make sure that all the pvlinks are configured correctly (I have doubt about that). So is there a way to check that the config is ok ?

(the disks are presented in Open-e 13 GB each which make the config impossible to check manually: I have nearly 800 LUN !)

Many thaks,
Farid

[Calandrello]

Friend
when you execute the command:
xpinfo - i |grep /dev/dsk/cxxtxxxx
anger to appear lunid it executes the command: xpinfo - i |grep lunid anger then to appear all alternate path after this vgxxx verifies with the command vgdisplay -v if all the devices that are alternates are added inside of the VG.

[Coolmar]

Hi,

With vgdisplay -v you should see the following:

PV Name /dev/dsk/c3t5d6
PV Name /dev/dsk/c6t5d6 Alternate Link

The only way that I knew to test them to ensure they worked was to physically unplug the FC cables to test fail-over. I pulled the primary first - did a bdf (took a few seconds to come back) - then plugged it back in - waited around 5 minutes; then pulled the alternate.

[Kevin Wright]

sure, check all your pvlinks with strings /etc/lvmtab;vgdisplay -v;xpinfo -il

[farid S]

Guys,

Thaks for the various and valuable hints you gave. But, I'm asking about any utility or home mad script that helps me get a descent human readable form of the output. I'm telling you this because I had a bout 450 LUN to check ??!!!

Many thanks,
Farid.

[Torsten.]

Hi,

you could try to ask your hp account support for the "switchxp" script - it combines the various lvm data with xpinfo.

[Heironimus]

Attached is a quick awk script I wrote for a similar situation. I have a better one in perl, but it does a lot more and would be a lot harder to customize for your exact needs.

The script has instructions at the top, but the short version is that you pipe "vgdisplay -v" in to the script and it prints a summary for every PV it finds. It just uses standard input and standard output so pipes and I/O redirection should work exactly how you expect.

You can run it all as a non-root user. It will probably take a while to go through that many devices.