topic Re: Missing /dev/vg00/lvol1 in Operating System - HP-UX

Missing /dev/vg00/lvol1

H S Z — Sat, 09 Jul 2005 02:02:57 GMT

Hi

I have L2000 with HP-UX 11.0
Autoboot is ON.
When it wants to boot, then it gives the following error; Exec failed: Cannot find /stand/vmunix or vmunix then it goes to ISL prompt. I've tried to boot into single user mode using hpux -is, the same error.
Now I've tried hpux -lm and then init 3 and it's up. We can access the server normally.
Now, bdf is not showing /dev/vg00/lvol1, and /stand is not mounted also.
I did also vgdisplay -v, the output does not show /dev/vg00/lvol1.

Please advice. I have oracle on it and am afraid we will end up by reinstalling the OS.

1 thing also, when i do "find / -name vmunix", it does not find it. the same to system also.

PLease your responses are most welcome.

Re: Missing /dev/vg00/lvol1

Devender Khatana — Sat, 09 Jul 2005 02:14:43 GMT

Hi,

Was there any problems prior to reboot ? Any errors reported in syslog & dmesg. It seems LVM header corruption or could be a media problem on the disk. Is root disk mirrored ? Try a few steps to diagnose this & post the outputs.

#ll /dev/vg00/*vol1

#vgdisplay -v /dev/vg00

#mount /dev/vg00/lvol1 /stand

#fsck /dev/vg00/lvol1

# lifls â l /dev/rdsk/c#t#d# (Root disk device file)

#lvlnboot â v

HTH,
Devender

Re: Missing /dev/vg00/lvol1

melvyn burnard — Sat, 09 Jul 2005 03:04:42 GMT

"Now I've tried hpux -lm and then init 3 and it's up. We can access the server normally.
Now, bdf is not showing /dev/vg00/lvol1, and /stand is not mounted also.
I did also vgdisplay -v, the output does not show /dev/vg00/lvol1."

This is because you have booted into LVM Maintenance mode, and then gon to run state 3, which is NOT a good idea.

I would suggest you boot the system into recovery mode using your Install/Recovery OS CD, and then examine why there appears to be no vmunix file.
You could also try interrupting the autoboot and boot to single user mode, but try using /stand/vmunix.prev

Re: Missing /dev/vg00/lvol1

D Block 2 — Sat, 09 Jul 2005 21:27:36 GMT

Horace,

I too decided to test your steps out.. just for a learning step..

ISL>

hpux -lm

ok,
I too, did the: hpux -lm

root@a:/# who -r
. run-level S Jul 9 22:51 S 1 3
root@a:/#
root@a:/# mount
/ on /dev/vg00/lvol3 log on Sat Jul 9 22:40:13 2005
/var on /dev/vg00/lvol8 delaylog on Sat Jul 9 22:40:24 2005
/usr on /dev/vg00/lvol7 delaylog on Sat Jul 9 22:40:24 2005
root@a:/#
root@a:/#
root@a:/#
root@a:/# grep lvol /etc/fstab
/dev/vg00/lvol3 / vxfs delaylog 0 1
/dev/vg00/lvol1 /stand hfs defaults 0 1
/dev/vg00/lvol4 /tmp vxfs delaylog 0 2
/dev/vg00/lvol5 /home vxfs delaylog 0 2
/dev/vg00/lvol6 /opt vxfs delaylog 0 2
/dev/vg00/lvol7 /usr vxfs delaylog 0 2
/dev/vg00/lvol8 /var vxfs delaylog 0 2
#mount -F vxfs /dev/vg01/sglvol1 /sgdata1
#mount -F vxfs /dev/vg02/sglvol1 /sgdata2
root@a:/# who -r
. run-level S Jul 9 22:51 S 1 3
root@a:/# bdf
Filesystem kbytes used avail %used Mounted on
/dev/vg00/lvol3 204800 95920 108064 47% /
/dev/vg00/lvol8 4706304 162800 4508416 3% /var
/dev/vg00/lvol7 1249280 930296 316504 75% /usr
root@a:/#

Re: Missing /dev/vg00/lvol1

Deepak.R — Sun, 10 Jul 2005 23:12:27 GMT

Hi,

try this as well.

Now, since the system is already booted, try using kmpath -k and see whether it shows the running kernel path.

also,

while the system reboots, interrupt boot and go to ISL prompt,

ISL > hpux ll

This should show the contents of /stand filesystem.

Do you have a root mirror disk ??
Pls check if there is any "stale" extends being displayed in lvdiaplay of different lvs

Re: Missing /dev/vg00/lvol1

Devender Khatana — Mon, 11 Jul 2005 05:17:01 GMT

Hi,

Deepak,

--->Now, since the system is already booted, try using kmpath -k and see whether it shows the running kernel path.

I think there is no kmpath command in this version of HPux. Are you relating something else here ?

Just a update.

HTH,
Devender

Re: Missing /dev/vg00/lvol1

H S Z — Mon, 11 Jul 2005 05:32:09 GMT

thanks all for ur replies. I really appreciate that.
Unfornately, the disk is not mirrored.
But i will still try ur options and get back to u asap.

BR

Re: Missing /dev/vg00/lvol1

H S Z — Tue, 12 Jul 2005 08:54:24 GMT

guys,

Please is there a way i can reinstall the HP-UX 11.0 again using my install/update/recovery CD without formatting? I mean if i can recover, and at the end, i can still access the oracle database sitting on it.

pLease advice asap.

Thanks

Re: Missing /dev/vg00/lvol1

Devender Khatana — Tue, 12 Jul 2005 09:01:10 GMT

Hi,

If your system does have multiple disks then all other disks except on which you load OS will retain there data & can be imported back. But for that also these should not be included in the same VG whcih was lying on your old root disk.

But there is no option where you can reload freshly without formatting the root disk.

So if you have oracle & oracle data on other disks this can be brought back online with some minor changes to OS like adding users & setting permissions & all.

HTH,
Devender

Re: Missing /dev/vg00/lvol1

DCE — Tue, 12 Jul 2005 09:08:22 GMT

Perhaps the LIF on your boot disk has gotten corrupted.

The following command should show you what is in the AUTO file in the LIF

lifcp dev/rdsk/c1t15d0:AUTO â

Re: Missing /dev/vg00/lvol1

H S Z — Tue, 12 Jul 2005 09:28:39 GMT

there is only one single hard drive. and all the oracle data is on that disk.

Please confirm if i can go ahead with reinstallation.

Horace

Re: Missing /dev/vg00/lvol1

Devender Khatana — Tue, 12 Jul 2005 10:04:44 GMT

Hi,

Reinstallation will remove all the data from the disk & you will require to reload oracle & restore backup.

HTH,
Devender

Re: Missing /dev/vg00/lvol1

Deepak.R — Wed, 13 Jul 2005 09:32:40 GMT

Hi,

You can try booting through the install/recovery CD and select the option to mount root and stand filesystems on /ROOT and /ROOT/stand respectively. Once this is done , do an umount of /ROOT/stand and /ROOT then fsck the disk ( /dev/dsk/CxTxDxs1lvm and /dev/dsk/CxTxDxs2lvm ) where /dev/dsk/CxTxDx is your boot disk . once fsck is through ,mount /ROOT and /ROOT/stand filesystems and check for the files .

Reboot the system in normal mode and see if this solve sthe issue.

thanks

Re: Missing /dev/vg00/lvol1

H S Z — Wed, 13 Jul 2005 09:37:11 GMT

I've reinstalled the system.

Thanks a lot guys and hope to hear from all again.

Horace

Re: Missing /dev/vg00/lvol1

H S Z — Wed, 13 Jul 2005 09:38:03 GMT

Iam more than OK with the forum.

Cheers!!!