topic Re: Volume group in Disk Enclosures

Volume group

alin_5 — Thu, 05 May 2005 06:05:41 GMT

What is the correct procedure to add a volume group on VA7410 ?

Re: Volume group

Vincent Fleming — Thu, 05 May 2005 08:39:44 GMT

A VA7410 has 2 volume groups - no more, no less. You can't configure that.

Re: Volume group

Uwe Zessin — Thu, 05 May 2005 09:21:18 GMT

Are you both talking about the same thing?

VA7xx0 storage arrays deal with what is called 'redundancy groups'.
When talking about a 'volume group' it is usually a construct at operating system level, although some disk arrays use that term as well.

Re: Volume group

alin_5 — Fri, 06 May 2005 00:21:14 GMT

I want somethigs like "What is the correct procedure to remove a volume group?"

http://www1.itrc.hp.com/service/cki/docDisplay.do?docLocale=en_US&docId=200000075095108

but for add a volume group

Re: Volume group

Uwe Zessin — Fri, 06 May 2005 00:29:00 GMT

Hello Alin,

I'm not a HP-UX administrator, so I can't tell the steps, but I think I have found a useful reference:
http://docs.hp.com/en/5990-8172/ch06s01.html

Re: Volume group

Joseph Loo — Fri, 06 May 2005 02:35:08 GMT

hi,

u may like to follow this:

http://www1.itrc.hp.com/service/cki/docDisplay.do?docLocale=en_US&docId=200000063200254

regards.

Re: Volume group

Thayanidhi — Sun, 08 May 2005 01:12:07 GMT

Volume group is nothing to do with VA7xxx.
Once the LUN is created (and assigned) to the host, the host see this LUN as a DISK. Then you have to follow the procedure from OS.

Steps:
Identify the unused disks.
ioscan -fnC disk (list all the disks).
vgdisplay -v (displays used disks).
Please note if the VA is accesses by more than one host you may see all the disks which used by other systems too. It doesn't mean that all are unused.

pvcreate /dev/rdsk/cxtxdx
mkdir /dev/vgxx
mknod /dev/vgxx/group c 64 0xyy0000
(yy is Vg id, unique within the system)
vgcreate /dev/vgxx /dev/dsk/cxtxdx
lvcreate -L -n /dev/vgxx
newfs -F /dev/vgxx/r
mount /dev/vgxx/ /mount_point
Edit /etc/fstab if you need them always.

You can also do from sam if not familier with LVM comands

Regds
TT

Re: Volume group

Naveej.K.A — Mon, 09 May 2005 04:18:38 GMT

Alin,

You might have to do a

insf -e

or insf -C disk before the ioscan.

Rest everything looks fine!!!

Regards,
Naveej