One Disk in Domain is corrupt.

[S Bhat]

Yestardey our tru64 (V4.0F) server crashed due to a fail in disk of a domain. The disk is not belong to any System dirs.

The error are given below.

26 19:48:51 cc_servervmunix Domain#Fileset: cc_domain#cc_fset
Oct 26 19:48:51 cc_servervmunix Domain#Fileset: cc_domain#cc_fset
Oct 26 19:48:51 cc_servervmunix Mounted on: /usr4
Oct 26 19:48:51 cc_servervmunix Mounted on: /usr4
Oct 26 19:48:51 cc_servervmunix Volume: /dev/rz34c
Oct 26 19:48:51 cc_servervmunix Volume: /dev/rz34c
Oct 26 19:48:51 cc_servervmunix Tag: 0x000334eb.82e1
:
Interrupt
Oct 26 19:48:51 cc_servervmunix Tag: 0x000334eb.82e1
Oct 26 19:48:51 cc_servervmunix Page: 55
Oct 26 19:48:51 cc_servervmunix Page: 55


The domain contains 3 disks , other 2 disks are fine.
I checked the disk using , varify and fixdmn commands. It is saying Media nonrecoverable.

Is it possible to copy using DD command on that disk to some new disk and swap this corrupted disk with new disk?? Will it work??

I am planning to do salvage on that disk at the end .

I dont have proper backup.

Thansk in advance..
shashi

[Victor Semaska_3]

shashi,

Is there a red or amber colored light on on the disk? If so, the disk is gone.

You say the disk is one of three. Is it a RAID-5 set or did you add volumes to the domain with the addvol command? A RAID-5 will reconstruct the data when you replace the bad disk.

Vic

[S Bhat]

Hello Victor,
Thanks for ur reply...

Disks are not in RAID :(.
Now I am running Salvage command on that domain.This is generation lots of files like below.
tag_197102, tag_311810, tag_tag_27072 .

Are these files useful to restore?? Only I recovered some 20% of data.

Thansk & Regards,
Shashi

[Victor Semaska_3]

Shashi,

Sorry but I've never used the salvage utility before so I can't help you there.

Vic

[Manish PATHAK_2]

There is no mirror ?

I think salvage will not recover complete data,have you tried mounting the disk somewhere else.

Br
Manish

[Venkatesh BL]

AdvFS could have alloted portions of a file in the drive that went bad. So, using 'dd' may not solve the problem. I think using 'salvage' would be your best bet.

Having a proper backup is always essential when you are dealing with important data.

'Tag' is the internal name assigned to the user files. So, tagXXX refers to a particular user file in the file system.

You could see the manpage of 'salvage' or google to learn more about the file names generated by it.

(I don't have a 4.0 machine here to confirm it)