Mounting File System Problem

[David Dangerfield_1]

vxfs mount: read of super-block on /dev/vg01/lvol10 failed: I/O error

I get this when trying to mount the above lvol.

[Pete Randall · Accepted solution]

Have you tried to fsck it? It's worth a try. If fsck fails, then it's probably time to dig out the backup tapes.


Pete

[David Dangerfield_1]

tried doing a fsck and get

fsck: /etc/default/fs is used for determining the file system type
vxfs fsck: /wrk wrong file type
file system check failure, aborting ...

[Torsten.]

Is it vxfs for sure?

Then try

# fsck -F vxfs /dev/vg01/rlvol10

[David Dangerfield_1]

Yes it is for sure. here is what we have in the fstab. File system had been working and we unmounted it and then when tried to remount it is when well bad things happened.

/dev/vg01/lvol10 /wrk vxfs rw,suid,nolargefiles,delaylog,datainlog 0 2

[Bill Hassell]

> vxfs mount: read of super-block on /dev/vg01/lvol10 failed: I/O error

"I/O error" is the keyword: your disk has a bad spot on it. You should some disk error messages in syslog. fsck cannot fix any I/O error -- it is a tool to sort out missing or incorrect pointers and entries in the directory. So all the errors you see (such as invalid filesystem) are due to the disk error. In this case, you'll need to replace the disk and if not mirrored, get out your backup tapes.

There is one cornercase that will also give an I/O error -- lvol10 was reduced in size. Without the latest online JFS code, lvreduce will damage the filesystem. If you know that lvreduce was done, run lvextend to try to put back the missing portions of the filesystem.

[Ganesan R]

Hi David,

try fsck -F vxfs -o full /dev/vg01/rlvol10

But i also suspect some bad blocks on the underlying disk. check the integrity of the disk with dd.

#dd if=/dev/dsk/cxtxdx of=/dev/null bs=1024k

[SKR_1]

Try

fsck -F vxfs -o full -o nolog -y /dev/dsk/rlvol6

Thanks
SKR

[ajin]

Hi David
This one help you
http://forums11.itrc.hp.com/service/forums/questionanswer.do?threadId=10062

Thanks & Regards
Ajin

[David Dangerfield_1]

Reolace drive and restored items from tape.
thanks to all for help