Not found some file systems

[praveen..]

Hi,
We have requested to add 200 GB disk to our server through SAN.

SAN Team informed me that disk has been added and you need to restart the server.

when i restart the server and i found some file systems are missing.

Please suggest how to re-scan the disk and how can i get my file systems/

I lost complete volume group.


#mount -a

mount: special device /dev/vg01/db2dms does not exist
mount: special device /dev/vg01/dmscode does not exist
mount: special device /dev/vg01/dmsextract does not exist
mount: special device /dev/vg01/dmsload does not exist
mount: special device /dev/vg01/dmslog does not exist
mount: special device /dev/vg01/home_dms does not exist


Thanks
Vipin

[Stuart Browne · Accepted solution]

What does 'pvscan' show you?

It sounds like the physical extents have disapeared from underneath the system.

Looking at the volume-group names there, it looks like you're using a 2.4.x series kernel, so RHEL3?

[Zeev Schultz]

vgdisplay -v /dev/vg01 and lvdisplay -v for vg01's volumes to verify that they're ok and there. also notice pv devices names in vgdisplay output,verify that they're present (via /proc/scsi... )

now,can run vgscan.

[praveen..]

Now these file systems are repaired by some other team.

They informed us that some body use the pvcreate on existing volumes.

can you please let me know the good & step by step study material or any URL for the file system, volume group, logical volume maintenance.


All servers are connected to SAN, and some times we need to send the request to add more disk into the server.

Thanks everybody