RAID migration

[Patrick_Boyd at Dell.com]

You cannot migrate from or to a spanned RAID level. The PERC controllers do not allow this.

To answer your other questions
*Is data preserved?
	Yes
*Is an online migration possible?
	Yes, using OMSA this is allowed. (It's called reconfiguration)
*Time needed to migrate an array consisting of 3 x 146 GB SAS 10k disks?
	There is a reconstruction rate in your controller properties that can help speed or slow this down. Additionally, your IO load makes a big impact on the time. I can't really give you a good timeframe because of these factors.
*What can I expect in terms of performance penalties while the migration is running?
	Again this depends on your reconstruction rate.

-----Original Message-----
From: linux-poweredge-bounces at dell.com [mailto:linux-poweredge-bounces at dell.com] On Behalf Of Christian Rishøj
Sent: Wednesday, April 22, 2009 6:40 AM
To: linux-poweredge-Lists
Subject: Re: RAID migration


Thanks.

Does anyone have past experience with RAID migration and Perc 6/i?

In particular:

  * Is data preserved?
  * Is an online migration possible?
  * Time needed to migrate an array consisting of 3 x 146 GB SAS 10k disks?
  * What can I expect in terms of performance penalties while the migration is running?

Regards

Christian


On 22 Apr 2009, at 13:22, <Patrick_Fischer at Dell.com> <Patrick_Fischer at Dell.com  > wrote:

> The reconstruct option is listed on a raid 5 in the vd tasks in open 
> manage server admin.
> The migration options are in the omsa manual.
> Add a disk => try reconfigure in omsa under the virtual disk tasks and 
> check it. Fastest way.
>
> -----Original Message-----
> From: linux-poweredge-bounces at dell.com 
> [mailto:linux-poweredge-bounces at dell.com
> ] On Behalf Of Christian Rishøj
> Sent: Mittwoch, 22. April 2009 13:11
> To: linux-poweredge-Lists
> Subject: RAID migration
>
> Is it possible to upgrade a 3-disk RAID5 to a 4-disk RAID10 with the 
> Perc 6/i?
>
> Regards
>
> Christian
>
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