Moving date from one EVA to another

[Igor Sovin]

Hi!
We need to move data from several LUNs on EVA5k to newely purchased EVA8k.
Can I do that? And how?

[jpmartin]

Hi Igor,

if you use or upgrade Command View to V7, you will have a Continuous Access for a 180 days grace priod.

The only thing is to update your licenses before this grace period.

Jean-Pierre

[Igor Sovin]

Thanks a lot, Martin!

[Rob Leadbeater]

Hi Igor,

What OS are you running ?

Some, Tru64 Unix for example, could do this just by adding the new volume (LUN) into the existing file domain, then removing the old LUN.

Cheers,

Rob

[Igor Sovin]

Martin, but where to get version 7.0? There is only 6.0.2 available for download from HP site.

[Igor Sovin]

Hi Rob!
I am running HP-UX 11.23
LUN from EVA5k are presented to servers running HP-UX 11.23.
I need to copy data from these LUNs to new EVA8k.

[Torsten. · Accepted solution]

For HP-UX you may consider to use LVM mirroring to "copy" the data from one EVA to another.

Add the new vdisk to the volume group and lvextend a mirror copy to the new vdisk.

Once this is done, lvreduce the copy from the old vdisk and finally vgreduce this vdisk.

You can do this online.

[Igor Sovin]

I've thought over the LVM mirroring, but now I dont exactly ho to do that.
What commands to I need to perform?

[jpmartin]

The CV V7 media must be purchased, or may be obtained from HP with maintenance.

[Rob Leadbeater]

Hi Igor,

Yes, you need to purchase CV EVA 7, although as you've got a new EVA8000, you may have bought it as part of that...

Part number if you need it is T3724E.

The versions of Command View available online are just patches. So the 6.0.2 version you mentioned will only install on top of 6.0.0 or 6.0.1.

Cheers,

Rob

[Torsten.]

The steps at a glance:

- review the currently setting of this VG
# vgdisplay -v vgxx

- adjust values if needed
(man vgmodify)

- create a new vdisk on the new EVA (probably same size preferred)

- adjust zoning and presentation

- run "ioscan" and "insf" on the new device

- create a physical volume on the new vdisk
(man pvcreate)

- extend the VG
(man vgextend)

- extend the logical volume
(man lvextend)
# lvextend -m 1 /dev/vgxx/lvol1 /dev/dsk/...

- reduce the mirror copy from the old disk
# lvreduce -m 0 /dev/vgxx/lvol1 /dev/dsk/...

- once all lvols are "moved", reduce the old vdisk from the VG

[Igor Sovin]

Torsten,

I have the following configuration:
Volume Group - vgSLT
The Logcal Volumes:
/dev/vgSLT/sapmntSLT
/dev/vgSLT/usrsapSLT
/dev/vgSLT/oracleSLT
/dev/vgSLT/oracle

VG resides on phisycal disk /dev/dsk/c13t0d0

Now I need to present new vdisk to secure path?
For example let it be /dev/dsk/c14t0d0
Then I need to perform

vgextend /dev/vgSLT /dev/dsk/c14t0d0
lvextend -m 1 /dev/vgSLT/sapmntSLT /dev/dsk/c14t0d0
lvextend -m 1 /dev/vgSLT/usrsapSLT /dev/dsk/c14t0d0
lvextend -m 1 /dev/vgSLT/oracleSLT /dev/dsk/c14t0d0
lvextend -m 1 /dev/vgSLT/oracle /dev/dsk/c14t0d0

then
lvreduce -m 0 -k /dev/vgSLT/usrsapSLT /dev/dsk/c13t0d0/
etc..

and
vgreduce /dev/vgSLT /dev/dsk/c13t0d0

Am I on the right way?

[Torsten.]

"Am I on the right way?"

Yes.
Also be aware of the other steps I mentioned (checking limits/pvcreate etc.).

[Igor Sovin]

Thanx guys!
And the points go to you !

[Igor Sovin]

By the way can I use simple dd to copy data from one disk to another?
Like this:
dd if=/dev/dsk/c13t0d0 of=/dev/dsk/c14t0d0 bs=1024k

[Torsten.]

I would not do this, because this may mess your configuration.

[Igor Sovin]

I've just noticed that we dont have Mirror-UX on few hosts and so we dont have licenses.. hmm

[Torsten.]

For these systems consider to take a backup (to tape or tar archive), create a new VG on the new EVA and restore the backup.