topic Re: Migrating RAID Arrays in Disk Enclosures

Migrating RAID Arrays

Ian Reid_2 — Fri, 05 Aug 2005 07:31:29 GMT

Can anyone help me???
I have a HP Proliant ML350 G4 server with two 36GB disks installed. They are configured as two different RAID 0 logical drives.

However this offers no protection of disk failure so iam looking to do the following:

Logical Drive 1 - Install an additional disk and migrate to RAID 1. The disk has the system partition and i would like data to remain intact.

Logical Drive 2 - Install two additional disks and migrate to RAID 5. The original disk has data installed so again i would like the data to remain intact.

Initial experiments have proved fruitless and although the ACU seems to have a Migrate feature i only seem to be able to expand the RAID 0 disk rather than migrate to a different RAID version.

Am i asking the impossible?

Any help will be much appreciated.

Regards

Re: Migrating RAID Arrays

Jefferson Humber — Fri, 05 Aug 2005 08:22:35 GMT

Ian,

Have you actually installed the extra HDD's in the server yet ?

If so is the ACU still saying it can't migrate the RAID level ?

I believe the size of the LUN has to remain the same when migrating, so if it's 36Gb when striped you have in install enough HDD's to give you 36Gb when in a RAID5 config too.

Re: Migrating RAID Arrays

e4services — Sat, 06 Aug 2005 21:34:06 GMT

Definately NOT the impossible. It is a support feature.
Are the new disks equal (exactly) or greater in capacity than the existing RAID0 drive?
Do you have an ACU manual?

Re: Migrating RAID Arrays

Ian Reid_2 — Mon, 08 Aug 2005 16:42:34 GMT

Thanks for getting back to me.
The drives are all the same make and model HP 36GB drives.
When i tried the RAID 1 migration first the only option i got was to stick with RAID 0 and extend the Logical Drive across the two disks.
I've had a look at the ACU manual and unfortunately the section on Migration is small and not very detailed.
So still stuck!!!

Re: Migrating RAID Arrays

Jefferson Humber — Mon, 08 Aug 2005 17:36:14 GMT

Ian,

What model SmartArray controller do you have, and at what firmware revision ?

Also, what version of ACU you using ?

Jeff

Re: Migrating RAID Arrays

Ian Reid_2 — Wed, 17 Aug 2005 15:08:04 GMT

Decided in the end to reinstall server. Thanks for everyones input though.