PERC4/DC : Convert single-disk RAID0 to dual-disk RAID1 andpreserve data?

[Patrick_Boyd at Dell.com]

It's pretty easy. There is a wizard in the GUI to walk you through it.
Or if you perfer the CLI it would be something like this:
	
	omconfig storage vdisk action=reconfigure controller=0 vdisk=0
raid=r1 size=max pdisk=0:0,0:1

(NOTE: instead of pdisk you should use adisk on older versions of OMSA)
Where 0 is the controller ID as reported by 'omreport storage
controller' and 0 is the vdisk ID as reported by 'omreport storage
vdisk' and 0:0 and 0:1 are the disks to make up the new RAID 1 volume.

Hope that helps,
Patrick Boyd
Dell Storage Software Engineer
(512)728-3182


-----Original Message-----
From: vincent at cojot.name [mailto:vincent at cojot.name] 
Sent: Thursday, March 01, 2007 3:10 AM
To: Boyd, Patrick
Cc: kuba at mareimbrium.org; linux-poweredge-Lists
Subject: RE: PERC4/DC : Convert single-disk RAID0 to dual-disk RAID1
andpreserve data?


Thanks for your reply.
I'll be trying to obtain OMSA and install it on this server.. Any extra
information on the 'reconfigure' OMSA cmd?

For the record, here's what I tried from the BIOS and where it failed to
perform as expected:

* Attempt 1):
- Create a single RAID-1 logical drive from the BIOS, reboot, get into
   MegaRAID BIOS again.
- Force offline the 'second' disk drive, this changes the logical drive
to
   'degraded'.
- Force online the 'second' disk drive, and attempt to rebuild it from
the
   menu (this failed because the PERC saw that this drive had already
been
   seen)

* Attempt 2):
- Create a single RAID-1 logical drive from the BIOS, reboot, get into
   MegaRAID BIOS again.
- Force offline the 'second' disk drive, this changes the logical drive
to
   'degraded'.
- Attempt to rebuild it from the
   menu without forcing the second drive 'online'(this failed because
the
   PERC said it could only rebuild 'failed' disk drives )

* Attempt 3):
- Create a single RAID-1 logical drive from the BIOS, reboot, get into
   MegaRAID BIOS again.
- Go to the 'reconstruct' menu and select 'second disk drive', launch
   'reconstruct' on it.
- I interrupted the process after several minutes because I was a little
   mislead by the 'menu labels'. The menus only offered one choice
(RAID-0)
   and mentionned I was reconstructing a RAID-1 to a RAID-0 from a
RAID-1
   logical drive. I was unsure if that could be what I wanted so I
bailed
   out.

Thanks for trying to help me out... :)

Vincent

On Wed, 28 Feb 2007, Patrick_Boyd at dell.com wrote:

> You can use the "reconfigure" command in OMSA. This will allow you to 
> convert a single RAID 0 to a RAID 1. You can find this command in both

> the OMSA GUI and CLI. This, and any other reconfigure operation, I 
> would highly recommend using OMSA to perform. It takes some of the 
> guess work out of it that the BIOS sometimes has.
>
> Patrick Boyd
> Dell Storage Software Engineer
> (512)728-3182