topic Re: Volume group HS but disks OK in Operating System - HP-UX

Volume group HS but disks OK

GRANDIERE — Fri, 29 Apr 2005 04:49:55 GMT

I had a problem with the disk array DS2100. HP repaired it. The ioscan is OK : The 4 disks of my vgdata1 are CLAIMED.

I can see the logical volumes in /dev/vgdata1. But in "sam", theses disks are in state unused ! The vgdata1 volume group is invisible in the "sam" list.

How can i recover my vgdata1 and the data that are stored in my disks.

Thanks a lot for help.

grandiere

Re: Volume group HS but disks OK

Naveej.K.A — Fri, 29 Apr 2005 04:52:14 GMT

Hi,

Post the output of vgdisplay -v /dev/vgdata1

Regards,
Naveej

Re: Volume group HS but disks OK

T G Manikandan — Fri, 29 Apr 2005 05:05:46 GMT

Also,please post the output of

#ll /dev/vgdata1

Re: Volume group HS but disks OK

GRANDIERE — Fri, 29 Apr 2005 05:06:07 GMT

[PRISME3]$vgdisplay -v /dev/vgdata1
vgdisplay: Volume group not activated.
vgdisplay: Cannot display volume group "/dev/vgdata1".

Re: Volume group HS but disks OK

T G Manikandan — Fri, 29 Apr 2005 05:10:52 GMT

#vgchange -a y /dev/vgdata1

Re: Volume group HS but disks OK

Naveej.K.A — Fri, 29 Apr 2005 05:12:28 GMT

Hi,

Please check

strings /etc/lvmtab
and make sure that the device file matches with the one you get through the ioscan.

if it doesn't matches.

mv /etc/lvmtab /etc/lvmtab.old
vgscan

vgchange -a y /dev/vgdata1

Regards,
Naveej

Re: Volume group HS but disks OK

GRANDIERE — Fri, 29 Apr 2005 05:12:48 GMT

See attachment ...

Theses logical volumes are used for Sybase devices.

Re: Volume group HS but disks OK

Suraj Singh_1 — Fri, 29 Apr 2005 05:33:08 GMT

You said you had a problem with DS 2100. was it a h/w problem?

If yes (which i am sure of), then run ioscan -fn and check the device file name for the disks (I suppose the disks in DS 2100 must be in some RAID arrangement, and what is being presented to the OS by this DS is only logical drives).

If you do not find the dev file name for these disks, build these files using "insf -e", take a backup of "/etc/lvmtab" and run "vgscan".

Now u should activate the VG.

Regards

Re: Volume group HS but disks OK

GRANDIERE — Fri, 29 Apr 2005 06:22:06 GMT

When i "strings /etc/lvmtab" it's OK.

The commande vgchange responds like this.
--------------------------------------------
[PRISME3]/ $vgchange -a y /dev/vgdata1
vgchange: Warning: Couldn't attach to the volume group physical volume "/dev/dsk/c4t2d0":
Device busy
vgchange: Warning: Couldn't attach to the volume group physical volume "/dev/dsk/c4t4d0":
Device busy
vgchange: Warning: Couldn't attach to the volume group physical volume "/dev/dsk/c4t6d0":
Device busy
vgchange: Warning: couldn't query physical volume "/dev/dsk/c4t2d0":
The specified path does not correspond to physical volume attached to
this volume group
vgchange: Warning: couldn't query physical volume "/dev/dsk/c4t4d0":
The specified path does not correspond to physical volume attached to
this volume group
vgchange: Warning: couldn't query physical volume "/dev/dsk/c4t6d0":
The specified path does not correspond to physical volume attached to
this volume group
vgchange: Warning: couldn't query all of the physical volumes.
vgchange: Couldn't activate volume group "/dev/vgdata1":
Quorum not present, or some physical volume(s) are missing.
--------------------------------------------

The vgdata1 is not in RAID arangement.
The ioscan is OK.
--------------------------------------------
disk 5 0/10/0/0.0.0 sdisk CLAIMED DEVICE HP 36.4GST336706LC
/dev/dsk/c4t0d0 /dev/rdsk/c4t0d0
disk 6 0/10/0/0.2.0 sdisk CLAIMED DEVICE HP 36.4GST336706LC
/dev/dsk/c4t2d0 /dev/rdsk/c4t2d0
disk 7 0/10/0/0.4.0 sdisk CLAIMED DEVICE HP 36.4GST336706LC
/dev/dsk/c4t4d0 /dev/rdsk/c4t4d0
disk 8 0/10/0/0.6.0 sdisk CLAIMED DEVICE HP 36.4GST336706LC
/dev/dsk/c4t6d0 /dev/rdsk/c4t6d0
--------------------------------------------

Thanks for you help.

GRANDIERE

Re: Volume group HS but disks OK

Naveej.K.A — Fri, 29 Apr 2005 06:29:40 GMT

Hi,

Can you please post the o/p of

strings /etc/lvmtab??

Regards,
Naveej

Re: Volume group HS but disks OK

GRANDIERE — Fri, 29 Apr 2005 06:39:16 GMT

[PRISME3]/ $strings /etc/lvmtab
/dev/vg00
/dev/dsk/c1t2d0
/dev/dsk/c5t9d0
/dev/dsk/c5t10d0
/dev/vgdata
/dev/dsk/c1t0d0
/dev/dsk/c2t0d0
/dev/dsk/c2t2d0
/dev/vgdata1
/dev/dsk/c4t0d0
/dev/dsk/c4t2d0
/dev/dsk/c4t4d0
/dev/dsk/c4t6d0
/dev/vgdata2
/dev/dsk/c5t0d0
/dev/dsk/c5t1d0
/dev/dsk/c5t8d0
/dev/vgdata3
/dev/dsk/c5t2d0
/dev/vgdata4
/dev/dsk/c5t3d0
/dev/vgdata5
/dev/dsk/c5t4d0
/dev/vgdata6
/dev/dsk/c5t5d0
/dev/vgdata7
/dev/dsk/c5t6d0

Re: Volume group HS but disks OK

Suraj Singh_1 — Fri, 29 Apr 2005 06:42:17 GMT

Along with the o/p of "strings /etc/lvmtab", also you should run "vgscan". Before running vgscan, copy /etc/lvmtab to say /etc/lvmtab.org.

Regards,
SUraj

Re: Volume group HS but disks OK

Naveej.K.A — Fri, 29 Apr 2005 06:46:56 GMT

Hi,

After moving your /etc/lvmtab do a vgscan and then try to activate the VG.

If it still doesn't work, execute the following commands and make sure the size doesn't return with 0KB

diskinfo /dev/rdsk/c4t2d0; diskinfo /dev/rdsk/c4t4d0; diskinfo /dev/rdsk/c4t6d0

Regards,
Naveej

Re: Volume group HS but disks OK

GRANDIERE — Fri, 29 Apr 2005 06:54:27 GMT

See attached file ...

Re: Volume group HS but disks OK

Naveej.K.A — Fri, 29 Apr 2005 07:06:28 GMT

Hi,

I think you forgot to move the /etc/lvmtab,

mv /etc/lvmtab /etc/lvmtab.old
vgscan -v
post the output.

vgchange -a y /dev/vgdata1

still problems??

do a diskinfo on the disk as mentioned in my previous thread.

post the output

--Naveej

Re: Volume group HS but disks OK

GRANDIERE — Fri, 29 Apr 2005 07:13:01 GMT

Yes, sory, i made a copy instead of making a move.

That the new output.

Re: Volume group HS but disks OK

GRANDIERE — Fri, 29 Apr 2005 07:19:37 GMT

[PRISME3]/etc $diskinfo /dev/rdsk/c4t2d0
SCSI describe of /dev/rdsk/c4t2d0:
vendor: HP 36.4G
product id: ST336706LC
type: direct access
size: 0 Kbytes
bytes per sector: 0
[PRISME3]/etc $diskinfo /dev/rdsk/c4t4d0
SCSI describe of /dev/rdsk/c4t4d0:
vendor: HP 36.4G
product id: ST336706LC
type: direct access
size: 0 Kbytes
bytes per sector: 0
[PRISME3]/etc $diskinfo /dev/rdsk/c4t6d0
SCSI describe of /dev/rdsk/c4t6d0:
vendor: HP 36.4G
product id: ST336706LC
type: direct access
size: 0 Kbytes
bytes per sector: 0
[PRISME3]/etc $diskinfo /dev/rdsk/c4t0d0
SCSI describe of /dev/rdsk/c4t0d0:
vendor: HP 36.4G
product id: ST336706LC
type: direct access
size: 35566480 Kbytes
bytes per sector: 512

See the fourth disk is OK and in the same disk array.

Re: Volume group HS but disks OK

Naveej.K.A — Fri, 29 Apr 2005 07:23:14 GMT

Sorry to drag you through a lot of commands/procedures.

I would requuest you to follow the following steps.

# insf -e C disk
# mv /etc/lvmtab /etc/lvmtab.old.1

# vgscan -v

# vgchange -a y /dev/vgdata1

If it still doesn't work, execute the following commands and make sure the size doesn't return with 0KB

diskinfo /dev/rdsk/c4t2d0; diskinfo /dev/rdsk/c4t4d0; diskinfo /dev/rdsk/c4t6d0

Regards,
Naveej

Re: Volume group HS but disks OK

Suraj Singh_1 — Fri, 29 Apr 2005 07:30:29 GMT

This is serious....

Size reported by diskinfo for c4t2d0, c4t4d0 and c4t6d0 is 0 KB.

Hope you have the backups handy...

Re: Volume group HS but disks OK

Naveej.K.A — Fri, 29 Apr 2005 07:32:52 GMT

I am afraid you are having bad disk. I think you have to call HP and log a call once again for your replacing your defective hard disks.

Regards,
Naveej