topic Re: Lost a filesystem in Operating System - HP-UX

Lost a filesystem

Zurida Azah Abdul Rahma_2 — Wed, 03 Sep 2003 05:27:26 GMT

When I do a bdf,I can't see a filesystem(/data1). It's missing.
1) When I type mount /dev/vg01/lvol1 /data1 the message /dev/vg01/lvol1:unrecognized filesystem.

2) When I type mount -a the message vxfs mount:cannot mount /dev/vg01/lvol1

3) When I type umount /data1 the message:cannot find /data1 in /etc/mnttab cannot unmount /data1

Appreciate if somebody can helpm me to solve the problem. Thanks in advance.

Re: Lost a filesystem

Con O'Kelly — Wed, 03 Sep 2003 05:46:58 GMT

Hi

It sounds like you have a corrupted filesystem.

The mount command is saying that it can't recognise a filesystem on /dev/vg01/lvol1.

Can you run fsck on /dev/vg01/lvol1?

Cheers
Con

Re: Lost a filesystem

malay boy — Wed, 03 Sep 2003 05:47:04 GMT

Hi,
Can you check whether the disk are OK.

Please do :

vgdisplay -v vg01

note the physical disk.

Check the disk using dd command .

dd if=/dev/ of=/dev/null

Easist way :

check dmesg or syslog to check whether hardware are ok or not.

regards
mB

Re: Lost a filesystem

Norman_21 — Wed, 03 Sep 2003 05:49:08 GMT

Hello,

Try this,

# fuser -cu /data1

check the entery of /data1 in /etc/fstab

let us know how it goes.
Thanks

Re: Lost a filesystem

Massimo Bianchi — Wed, 03 Sep 2003 05:54:19 GMT

First step: what chenged since the last time you had the FS ?
a reboot?
a rename ?

Second: please do a "lvdisplay /dev/vg01/lvol1"

and tell us the results.

third: maybe it was used as a swap, and now you forgot the proper name?

check with
swapinfo -tma

Massimo

Re: Lost a filesystem

Zurida Azah Abdul Rahma_2 — Wed, 03 Sep 2003 07:06:18 GMT

Hi, I've the the following:

1) fsck /dev/vg01/lvol1
Message appreared:cannot open device /dev/vg01/lvol1

2) vgdisplay -v vg01
Everything looks normal

3)fuser -cu /data1
Message appreared:/data1:fuser:could not find file system mounted at /data1

4)Chk in fstab - the entry filesystem /data1 is the there

Re: Lost a filesystem

Norman_21 — Wed, 03 Sep 2003 07:13:43 GMT

Salams Zuridah,

You might need to try to boot into single user mode and try to mount the file system.
init 1

Also check to make sure that you have the directory /data1 at the root level!

Salamu aliakum
Latif

Re: Lost a filesystem

T G Manikandan — Wed, 03 Sep 2003 07:16:35 GMT

Is the VG in available state

check it in the vgdisplay output.
check whether the group is activated.

Else do a

#vgchange -a y /dev/vg01
#mount -a

Thanks

Re: Lost a filesystem

Massimo Bianchi — Wed, 03 Sep 2003 07:19:19 GMT

1) fsck /dev/vg01/lvol1
Message appreared:cannot open device /dev/vg01/lvol1

lvdisplay /dev/vg01/lvol1

works???

ll /dev/vg01/lvol1

Is the file there? is a special file?

Massimo

Re: Lost a filesystem

T G Manikandan — Wed, 03 Sep 2003 07:32:13 GMT

Try this
Probabily the fstab does not have the vxfs type specified.
#mount -F vxfs /dev/vg01/lvol1 /data1

Re: Lost a filesystem

Zurida Azah Abdul Rahma_2 — Thu, 04 Sep 2003 01:17:38 GMT

Hi,

I've checked the vg and it is activated.When I do a ll /dev/vg01/lvol1-the files are there.In the /etc/fstab the vxfs type is specified.
Thanks

Re: Lost a filesystem

Michael Tully — Thu, 04 Sep 2003 01:26:54 GMT

Please provide the following information.

# fstyp -v /dev/vg01/lvol1

and

the entry from /etc/fstab for this logical volume.

Re: Lost a filesystem

Zurida Azah Abdul Rahma_2 — Thu, 04 Sep 2003 01:42:58 GMT

Hi Michael,

1) fstyp -v /dev/vg01/lvol1
Message appeared:unknown-fstyp(no matches)

2)In /etc/fstab entry

/dev/vg01/lvol1 /data1 vxfs rw,suid,delaylog,detainlog 0 2

Thanks

Re: Lost a filesystem

Con O'Kelly — Thu, 04 Sep 2003 01:53:58 GMT

Hi

Going back to your original post and point 1.
mount /dev/vg01/lvol1 /data1
message /dev/vg01/lvol1:unrecognized filesystem

This implies to me that there is no filesystem on the /dev/vg01/lvol1 or it is badly corrupted.
The fact that you are also unable to run fsck is a worry.
I'm a little surprised at the message from fsck. Can you run it again & post the return code from fsck (run echo $?).

I think you are going to have to look at restoring this filesystem from backup if you have one.
I would recreate the LV(lvcreate) & filesystem (newfs) & then restore the data.

The only other issue is the disk itself is corrupted which someone mentioned earlier in the thread.

Cheers
Con

Re: Lost a filesystem

Steven E. Protter — Thu, 04 Sep 2003 02:23:31 GMT

Two options in my opinion:

fsck -F vxfs -o full -y

If the fs was intended to be hfs this might also work with hfs instead of vxfs

I don't think that will work, but its worth a try.

There is no filesystem, so its newfs time.

Make sure you have a backup handy.

newfs -F vxfs

SEP

Re: Lost a filesystem

Tim Adamson_1 — Thu, 04 Sep 2003 03:24:42 GMT

Did anything change recently on your system? New patches or did you upgrade the vxfs version of the filesystem?

Tim.

Re: Lost a filesystem

Zurida Azah Abdul Rahma_2 — Thu, 04 Sep 2003 03:43:34 GMT

Hi Con,

I've tried running fsck again. Same message appeared.No device /dev/vg01/lvol1.

Re: Lost a filesystem

Tim Adamson_1 — Thu, 04 Sep 2003 03:50:28 GMT

If the filesystem was a version 4 type filesystem, then patch PHCO_24635 (11.00) or PHCO_24636 (11.11) fixes a problem like this.

What is the mount(1M) patch you have installed on the system and is the filesystem a version 4???

Tim

Re: Lost a filesystem

Tim Adamson_1 — Thu, 04 Sep 2003 03:54:15 GMT

Might point out that in all likelihood, you will have to recreate the lvol, newfs, mount and restore the data.

My previous posts were aimed at trying to determine the cause and a way to prevent it in the future.

Tim

Re: Lost a filesystem

T G Manikandan — Thu, 04 Sep 2003 05:37:44 GMT

What OS version you are running.

there is a fix for 10.20 version

Also revert as what patch bundles you are running on the system?

Thanks