VG01 Missing!

[Denda]

Hi All. HP2470 11.11, lost power last weekend & have been battling with how to get our system to recognize VG01 again. vgscan ->
Following Physical Volumes belong to one Volume Group.
Unable to match these Physical Volumes to a Volume Group.
Use the vgimport command to complete the process.
/dev/dsk/c4t2d0
/dev/dsk/c4t3d0
/dev/dsk/c4t14d0

vgscan: has no correspoding valid raw device file under /dev/rdsk.
Verification of unique LVM disk id on each disk in the volume group
/dev/vg01 failed.

All of the drives are checking out OK via mstm & claimed under ioscan. Devices ARE under /dev/rdsk & /dev/dsk.

I have renamed my lvmtab file & run vgscan again with no success of updating the lvmtab.

There is data on these drives & they are being used. Any idea on how to fix this w/o losing all my data in VG01?

 

[Chacalinc]

did you try the vgimport?


Chacal, Inc.

 

[Denda]

no, for some reason I was thinking that would kill my data.
So what I'm going to do is the following

vgimport -v /dev/vg01 /dev/dsk/c4t0d0 /dev/dsk/c4t1d0 /dev/dsk/c4t2d0 /dev/dsk/c43d0 /dev/dsk/c4t14d0

Then IF that takes...

vgchange -a y vg01

Does that sound correct? I've been blessed with not having many major issues with my servers, so my skills are a tad rusty.. Thanks in advance

 

[Chacalinc]

that's correct. vgimport will NOT erase any data, it will take the disks and leave them as a VG. Remember to create the folder in /dev and create the node (mknod). if it exists, you could try exporting the VG01 first.

Cheers.

Chacal, Inc.

 

[Denda]

what's the command on the mknod? I did forget that step. Thank you so much

 

[Chacalinc]

mkdir /dev/vg01
mknod c 64 0xAA0000 /dev/vg01/group

(I don't have a hp-ux with me right now, see man mknod)
where AA is the minor number

Cheers.

Chacal, Inc.

 

[Chacalinc]

sorry, mknod is:

mknod /dev/vg01/group c 64 0xAA0000

where AA is the minor number

in order to know what minor to use issue:

ll /dev/*/group

and note a free 0xAA0000

Chacal, Inc.

 

[Denda]

ll /dev/*/group
crw-r----- 1 root sys 64 0x000000 Nov 6 2002 /dev/vg00/group
crw-rw-rw- 1 root sys 64 0x010000 Aug 13 2003 /dev/vg01/group
crw-rw-rw- 1 root sys 64 0x020000 Aug 13 2003 /dev/vg02/group
crw-rw-rw- 1 root sys 64 0x030000 Aug 13 2003 /dev/vg03/group
cr--r--r-- 1 root sys 64 0x040000 Mar 30 2004 /dev/vg04/group

Can I just use the existing '01' from the original vg01? I'm trying to but it's stating it already exists?

mknod /dev/vg01/group c 64 0x010000
mknod: File exists

vgchange -a y /dev/vg01
vgchange: Couldn't activate volume group "/dev/vg01":
Quorum not present, or some physical volume(s) are missing.

Thank you again for all your help. I would usually be scoping out ITRC on hp's site, but it's down today. )

 

[Chacalinc]

no, you can not use an existing defined VG...

try exporting the vg01 first

Chacal, Inc.

 

[Denda]

ugh!

vgexport -m vg01.mymap /dev/vg01
vgexport: Volume group "/dev/vg01" does not exist in the "/etc/lvmtab" file.
vgexport: Couldn't export volume group "/dev/vg01

 

[Chacalinc]

hmmm... do you see any entry in [tt]strings /etc/lvmtab[/tt] regargind vg01?

Chacal, Inc.

 

[Denda]

/dev/vg00
/dev/dsk/c1t15d0
/dev/dsk/c3t15d0
/dev/vg02
/dev/dsk/c4t6d0
/dev/vg03
/dev/dsk/c4t7d0
/dev/dsk/c4t8d0
/dev/dsk/c4t9d0
/dev/dsk/c4t10d0
/dev/dsk/c4t11d0
/dev/vg04
/dev/dsk/c4t12d0
/dev/dsk/c4t13d0

hmmmm.... OK - should I just delete the exisitng /dev/vg01 & start again from the beginning? Then just give this new vg01 a new minor of 5. Will that cause any issues?

 

[Chacalinc]

no issues with that, after all, lvmtab rules in LVM. but 01 going to be free so you can use it.

Cheers.

Chacal, Inc.

 

[Chacalinc]

so? well.. hope is everithing is well now, I must get home.

Cheers.

Chacal, Inc.

 

[Denda]

go on home. Thank you! I've got my dba checking things out on his end. Looks as though everything worked this last time. I'll report back once I get some info from him. I can't thank you enough for helping me out.

 

[Chacalinc]

great! post me the results, I'm interested..

Cheers.

Chacal, Inc.

 

[Chacalinc]

so? what happened?

Chacal, Inc.