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

Kuba Ober kuba at
Wed Feb 28 07:50:14 CST 2007

On Wednesday 28 February 2007, vincent at wrote:
> Hello everyone,
> I have a system using a single-disk SCSI config in a single logical drive
> on a PERC 4e/DC. I have obtained an identical SCSI disk and I'd like to
> convert the system to RAID-1. I.E: The original single disk would become
> part (and retain its OS/data on it!)  of a RAID-1 logical drive.
> Typically, this would most likely involve creating a RAID-1 with a single
> disk survivor, add another disk later and resync the second disk drive.
> However, the PERC4 won't let me create a single-disk RAID-1, only RAID-0
> is allowed.

Did you try doing it from the controller's BIOS? I find that it's way more 
tolerant of one's intentions. The OMSA is web-based unitlity is quite 
limiting IMHO. The command line omconfig may let you do what you want to do, 
although I haven't tried.


More information about the Linux-PowerEdge mailing list