topic Re: vgcreate URGENT in Operating System - HP-UX

vgcreate URGENT

Nanda M — Fri, 09 Oct 2009 10:51:16 GMT

Team,

need solution for below error,

if i do vgcreate i am getting below error
A volume group is already using this major and minor number.

===============================================
gbdxgme1 # vgcreate -s 4 /dev/vgsitSD3 /dev/dsk/c0t4d0
Increased the number of physical extents per physical volume to 30499.
vgcreate: Volume group "/dev/vgsitSD3" could not be created:
A volume group is already using this major and minor number.
Please check the minor number of the "group" device file.
==============================================

Re: vgcreate URGENT

Michal Kapalka (mikap) — Fri, 09 Oct 2009 11:05:57 GMT

hi,

check the man page of vgcreate :

http://docs.hp.com/en/B2355-60105/vgcreate.1M.html

it always a playng with parameter

-s / -e / -p

-e max_pe

Set the maximum number of physical extents that can be allocated from any of the physical volumes in the volume group. The default value for max_pe is 1016. However, if the size of any physical volume exceeds 1016 times the pe_size, the default value for max_pe is adjusted to match the physical volume size. The maximum number of physical extents can be a value in the range 1 to 65535.

mikap

Re: vgcreate URGENT

TTr — Fri, 09 Oct 2009 11:09:45 GMT

> A volume group is already using this major and minor number.
> Please check the minor number of the "group" device file

Did you check the "group" file? You may have to recreate the group file with a different number.
ll /dev/vg*/group

If you have a group file major number conflict, delete the group file of the vgsitSD3 and recreate it with a different number.

Re: vgcreate URGENT

Nanda M — Fri, 09 Oct 2009 11:18:39 GMT

Thanks for reply,

I have removed group file but still giving same error

Re: vgcreate URGENT

Patrick Wallek — Fri, 09 Oct 2009 11:50:18 GMT

>>I have removed group file but still giving same error

Did you create another group file with a different minor number? Each VG **MUST** have a group file.

Re: vgcreate URGENT

Nanda M — Fri, 09 Oct 2009 11:55:46 GMT

Yes i could create with another

Re: vgcreate URGENT

Sunny123_1 — Fri, 09 Oct 2009 12:12:56 GMT

Hi

Firsty did you have the group file having same minor number?

then use diffrent minor number

delete old group file and then

create a group file like below

mknod /dev/vgname/group c 64 0x0000001

last one is minor number you want

Also post your all group files here.

Regards
sunny

Re: vgcreate URGENT

Patrick Wallek — Fri, 09 Oct 2009 12:25:12 GMT

>>mknod /dev/vgname/group c 64 0x0000001
>>last one is minor number you want

That's not quite right.

The minor number IS the last parameter on the command line above. BUT, the minor number itself is the 1st 2 characters AFTER the 'x'.

mknod /dev/vgname/group c 64 0x??0000

Where the '??' the the appropriate minor number for this group file.

Remember that this is in HEX so the appropriate range is 00 to FF, but the value, when converted to decimal, must be LESS than the value of your MAXVGS kernel parameter.

Re: vgcreate URGENT

Sunny123_1 — Fri, 09 Oct 2009 12:29:26 GMT

Hi

Yes Patrick you are right

This is in HEX so the range is 00 to FF

Regards
Sunny

Re: vgcreate URGENT

TTr — Fri, 09 Oct 2009 13:20:53 GMT

> Yes i could create with another

It would help if you showed us the output of the following commands

ll /dev/vg*/group
strings /etc/lvmtab

Re: vgcreate URGENT

melvyn burnard — Fri, 09 Oct 2009 14:52:33 GMT

also, are you using HP-UX 11.31? If so, the kermnel maxvgs no longer exists.

I suggest you provide the output of:
ll /dev/*/group

Re: vgcreate URGENT

Martín García — Sat, 10 Oct 2009 19:32:26 GMT

Nanda, check if another device is not using that minor number.

perhaps someone do a mknod for that minor number

regards
Martin

Re: vgcreate URGENT

gb karki — Sun, 11 Oct 2009 09:37:28 GMT

Hi Nanda,

please check vgsitSD3 device name is using somewhere else in the server.

Rgds
Karki