unable to mount file system

[SHADRACH AMARH]

hi guys,
i restarted my server and the error i get when i do mount -a on one of the file system is this
..file system on /dev/vgsanidw/lvol1 has structural damage.. i this because when i do bdf, i dont see this particular file system, can someone please help me out..?

[Aneesh Mohan]

#fsck -F vxfs -o full,nolog /dev/vgsanidw/rlvol1

#mountall


Aneesh

[SHADRACH AMARH]

hi boss
i did it and this is what i got..
# fsck -F vxfs -o full,nolog

/dev/vgsanidw/rlvol1
vxfs fsck: OLT extent 0 has bad magic
read of primary OLT failed
vxfs fsck: OLT extents conflict
read of OLT copy failed
vxfs fsck: no valid OLT, cannot continue
file system check failure, aborting ...

[Jayan Nair]

Hi,
check for cosole log for any inode corruption.
Please provide he below output
strings /etc/lvmtab
check the disk are available for this VG

[Bill Hassell]

> vxfs fsck: OLT extent 0 has bad magic
> read of primary OLT failed...

This indicates that the directory has been badly corrupted and will have to be restored from backup tapes.

[Vijaykumar_1]

Hello,

OLT is nothing but Object Location Table, which is used at the time of mounting a filesystem.

OLT gets corrupt due to scenario's like unexpected shutdown etc..

I hope the only way to recover is restoring from the recent back-up as Bill mentioned earlier..

[Kapil Jha]

as a last option just before restoring,
you may try to fsck from alternate blocks

sck -o full -y -b

list of alternate super blocks is stored in /etc/sbtab

or u can try 16, 8240 or 16464 as they are common values.

BR,
Kapil+

[Kapil Jha]

fsck -o full -y -b