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[opensuse] Quirky software RAID1 Question - Howto mount 1 drive on another machine?
  • From: "David C. Rankin" <drankinatty@xxxxxxxxxxxxxxxxxx>
  • Date: Fri, 10 Apr 2009 23:15:00 -0500
  • Message-id: <49E01944.3000208@xxxxxxxxxxxxxxxxxx>

I have a quandary. I had two Seagate 750G drives in a software raid on
A. I needed to remove one of the drives and RMA it due to excessive read/write
head schizophrenia. I now have the device out of the box to RMA but I need to
mount it to delete some of the data. I tried mounting is via usb, but received
an error due to raid as the file type:

[23:03 alchemy:/home/david/linux/packages/SRPMS] # mount /dev/sdb1 /mnt/750
mount: unknown filesystem type 'linux_raid_member'

So next I decided to create a temporary md0 on my laptop and add one
drive to
the array. No dice:

[23:06 alchemy:/home/david/linux/packages/SRPMS] # mdadm --create /dev/md0
--level=1 --raid-devices=2 /dev/sdb1 /dev/sdc1
mdadm: /dev/sdb1 appears to contain an ext2fs file system
size=732571864K mtime=Fri Apr 3 20:21:45 2009
mdadm: /dev/sdb1 appears to be part of a raid array:
level=raid1 devices=2 ctime=Fri Mar 27 15:38:36 2009
mdadm: Cannot open /dev/sdc1: No such file or directory
mdadm: create aborted


OK maybe:

[23:03 alchemy:/home/david/linux/packages/SRPMS] # mdadm --create /dev/md0
--level=1 --raid-devices=1 /dev/sdb1
mdadm: '1' is an unusual number of drives for an array, so it is probably
a mistake. If you really mean it you will need to specify --force before
setting the number of drives.

Again no joy!

Well, how to skin this cat, there must be an easy way, but obviously I'm
struggling with it. What say the RAID gurus?

David C. Rankin, J.D.,P.E.
Rankin Law Firm, PLLC
510 Ochiltree Street
Nacogdoches, Texas 75961
Telephone: (936) 715-9333
Facsimile: (936) 715-9339
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