need to ghost a single raid0 disk ... linux tool?

hedpe · 03-08-2006, 06:34 PM

Hi,

I have a RAID-0 which is comprised of... 2 disks

I need to image 1 of these disks to another disk because it is failing. I can't "cp" stuff because its in the raid format, so... are there any linux tools that I can copy the disk image to another disk?

Thanks!
George

uselpa · 03-10-2006, 02:04 PM

If you boot with a live CD, assuming that /dev/hda is the failing disk, /dev/hdb is the good one, and /dev/hdc is the shiny new one of the same size, I'd assume that a simple

Code:

dd if=/dev/hda of=/dev/hdc

should do.
Not sure though, but worth a try.

AwesomeMachine · 03-11-2006, 01:02 AM

Quote:

Originally Posted by hedpe

Hi,

I have a RAID-0 which is comprised of... 2 disks

I need to image 1 of these disks to another disk because it is failing. I can't "cp" stuff because its in the raid format, so... are there any linux tools that I can copy the disk image to another disk?

Thanks!
George

With raid, multiple physical disks are seen by the os as a single physical disk. What you want to do is take the good drive out of the machine. Leave the bad drive, and the new empty drive in the machine. If you are using a raid controller, disable the raid on it. Then, boot with a live CD and copy the bad drive to the new drive with dd. See reply above^^^^^^^^^.

Put the good drive back in the machine, and turn raid back on. There is a slight hope you won't end up with hamburger for data. Raid 0 not good. Raid 1 good.