Consolidate Physical Disks

[CJENSEN_1]

I have a VA7100, connected to a RP5470 running HPUX 11.11. I have a couple of volume groups with more than one disk per volume group. I would like to clean this up - ie - one physical disk per volume group. Was wondering what steps are involved in doing this.
Thanks.

[Steven E. Protter · Accepted solution]

Shalom,

One physical disk per volume group?

Why use LVM at all. You can do physical disk allocation.

The point of LVM is to give you storage flexibility, many disks in a vg or one. So you want to use the tool that makes you flexible to make your configuration inflexible.

Okay, I can see a valid reason to do this, to permit you to separate database i/o but that could be handled by disk distribution within a volume group.

So.

1) Back up your data, because you are probably going to hammer something.
2) remove all logical volumes from a disk to be removed from the volume group. Or vgexport the whole volume group and rebuild.
3) vgreduce vgname full_path_to_disk
4) Go through man vgcreate and build a volume group with one disk in it.

I can't wait to see other's responses to this query, which will undoubtedly be more entertaining than mine.

:-)

All of this can be done with SAM.

SEP

[CJENSEN_1]

We're a small shop, and I only do the HPUX admin on a part time basis.

I'm curious when you say you can use SAM for everything. I'll recap what I do:

1) use cvui to create the LUN
2) go into SAM, create the volumne group and do the logical volume stuff

So I've got two LUN's (two physical volumes) created on the VA7100, that are in one volume group. I wish to delete the LUN's, and recreate them as one LUN.

[Torsten.]

This is a lot of work and I cannot see any reason why you want to do this.
I would not do any changes ...

[CJENSEN_1]

I appreciate your comment. I was looking to determine if it was really worth it or not.

[CJENSEN_1]

Thx