topic mount verification error in SAN in Operating System - OpenVMS

mount verification error in SAN

Kumaresan Giri — Sat, 15 Jul 2006 13:52:48 GMT

Dear Friends,
I have RA8000 storage array,frequently all the disk shows mount verification error with beep sound in storage array. This storage array is connected with 4 node ES40 Alpha server cluster.
what is the reason for mount verification.

regards,
kumaresh

Re: mount verification error in SAN

Volker Halle — Sun, 16 Jul 2006 00:57:58 GMT

kumaresh,

welcome to the OpenVMS ITRC forum.

A mount-verification is triggered by certain classes of disk IO errors. OpenVMS tries to re-establish or verify the IO path to and the contents (volume label etc.) of the disk(s), which incurred the IO error.

To further analyze these mount-verifications and trying to find the underlying reason, concentrate on all components in the IO path to the disks.

Look at OPERATOR.LOG entries and ERRLOG entries (using DECevent or WEBES/SEA) on the OpenVMS systems. Also look at the HSG80 console for error messages. Try to document and sort these errors according to their timestamsp and find out, what happens when.

In a SAN, any errors in the FC path to the HSG80 controllers will also cause mount-verifications to trigger.

If there is a beep sounding in the storage array, the problem is most likely in the HSG80s, so start there.

Volker.

Re: mount verification error in SAN

Art Wiens — Sun, 16 Jul 2006 10:29:09 GMT

The beep is most likely produced by the EMU (Environment Monitoring Unit?). Perhaps there's a power situation (either source or a power supply)? The HSG log should give you a good idea of what's going on.

If you don't have it, consider connecting an old pc's serial port to the HSG console port and using something like KEA (or HyperTerm I guess) with their associated "capture to file" enabled.

Something will turn up. Should be listed as an "instance" or "last failure" code. Have look here when you have a code:

http://h18000.www1.hp.com/support/askkcs/hpcg/215_0_220170202_3985025.html

Cheers,
Art