topic Re: Mounting File System Problem in Operating System - HP-UX

Mounting File System Problem

David Dangerfield_1 — Mon, 01 Dec 2008 19:13:26 GMT

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

I get this when trying to mount the above lvol.

Re: Mounting File System Problem

Pete Randall — Mon, 01 Dec 2008 19:18:46 GMT

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

Re: Mounting File System Problem

David Dangerfield_1 — Mon, 01 Dec 2008 19:32:15 GMT

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 ...

Re: Mounting File System Problem

Torsten. — Mon, 01 Dec 2008 19:42:04 GMT

Is it vxfs for sure?

Then try

# fsck -F vxfs /dev/vg01/rlvol10

Re: Mounting File System Problem

David Dangerfield_1 — Mon, 01 Dec 2008 19:47:27 GMT

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

Re: Mounting File System Problem

Bill Hassell — Tue, 02 Dec 2008 00:39:38 GMT

> 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.

Re: Mounting File System Problem

Ganesan R — Tue, 02 Dec 2008 07:52:34 GMT

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

Re: Mounting File System Problem

SKR_1 — Tue, 02 Dec 2008 11:30:23 GMT

Try

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

Thanks
SKR

Re: Mounting File System Problem

ajin — Wed, 03 Dec 2008 03:37:50 GMT

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

Thanks & Regards
Ajin

Re: Mounting File System Problem

David Dangerfield_1 — Thu, 04 Dec 2008 19:54:30 GMT

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