AIX

Hi all,
We are migrating our SAN storage from HSV360 to 3PAR. The system runs aix 6.1 version with HACMP.
Please let me know what are requirements from OS side and how are the data copied to the new disks.

Hi Elizabeth,

I'm going to guess that you're meaning an LPAR here, running AIX 6.1 also guessing that it's part of a cluster. If you are actually moving to a HP 3PAR array, can you be a little more specific please?

But that's about all I can guess at, how are the storage arrays attached? What other information can you give us?

Regards

Gull04

Do you see all the new disks on your AIX server? If so, you can:-
Does this seem a sensible approach to you?



Robin

Hi Elizabeth,

It would also be possible to mirror the data over the two arrays - a solution I used when going from DS8300 to VMax.

Regards

Gull04

Well,
You need ODM definitions for the new storage, then you can extend the disks into each vg, followed by migration of LV's, update the passive node and lastly sync the cluster.

Hi Gull04

I am not sure how to check about how are they attached. I am just in the learning phase. if you tell me what details you need in specifi , i can provide them to you.


Hi Robin,

We havnt started the migration yet hence the disks are not added.

I was wondering whether i need to upgrade firware or hba level for this. should i change the mpio?
Also the rootvg doesnt need to be touched right? they are SCsi disks.
so i suppose its only the dataVg that needs to be migrated.

So when its a cluster environment do i need to make any changes in the hacmp configuration after the migrations?

Thanks in advance!

So, if the SAN side beleives that the disk LUNs are assigned to the AIX partition, run cfgmgr -S as root on AIX to discover the devices. Hopefully you will see the difference between lspv before and after. You should see the existing disks marked as belonging to volume groups and the new ones be listed as volume group "none" They will likely be the higher number hdisks in the display.

If the disks are for an Oracle running ASM, then it's possible that the disks as a whole may be assigned to Oracle and that will make it trickier. Do we need to consider this?


Can you get downtime on the cluster for all this?




Regards,
Robin