software RAID

[reggler]

Hi,

I got two new harddisks and used mdadm to create a mirror array:

mdadm --create --verbose /dev/md0 --level=1 --raid-devices=2 /dev/sdb6 /dev/sdc6

then I added following to my /etc/mdadm/mdadm.conf:

# mdadm.conf
#
# Please refer to mdadm.conf(5) for information about this file.
#

# by default, scan all partitions (/proc/partitions) for MD superblocks.
# alternatively, specify devices to scan, using wildcards if desired.
DEVICE /dev/sdb6 /dev/sdc6

# auto-create devices with Debian standard permissions
CREATE owner=reg group=reg mode=0660 auto=yes

# automatically tag new arrays as belonging to the local system
HOMEHOST <system>

# instruct the monitoring daemon where to send mail alerts
MAILADDR root

# next line added by reg 09/01/2009
ARRAY /dev/md0 devices=/dev/sdb6, /dev/sdc6

# This file was auto-generated on Mon, 31 Aug 2009 20:47:31 -0700
# modified by reg 09/01/2009
# by mkconf $Id$

On bootup I get told:
mdadm: only give one device per ARRAY line: /dev/md0 and /dev/sdc6
which i don't quite understand as I followed the instructions i found on http://linuxdevcenter.com/pub/a/linu...2/05/RAID.html

But then also, how do I get this mounted? I did create ext 3 partitions on those disks that i can see with QtParted (showing me three disks: /dev/sda (system) /dev/sdb & /dev/sdc).
cfdisk /dev/md0 tells me:
FATAL ERROR: Cannot read disk drive
Press any key to exit cfdisk

What's going on here? What am i missing?
Thanks!
Ron

[Snowhog]

Re: software RAID

The site you linked from which you followed instructions is nearly seven years old. You might want to review HOWTO: Linux Software Raid using mdadm over on Ubuntuforms. It's newer (April 2007).

[reggler]

Re: software RAID

The site you linked from which you followed instructions is nearly seven years old. You might want to review HOWTO: Linux Software Raid using mdadm over on Ubuntuforms. It's newer (April 2007).

I don't think the ddate really matters, I found the error, I typed one space too much in my conf:
ARRAY /dev/md0 devices=/dev/sdb6, /dev/sdc6 should be ARRAY /dev/md0 devices=/dev/sdb6,/dev/sdc6 - it seems to work now

Thanks anyways!

Ron

[Snowhog]

Re: software RAID

Amazing what a little space can do!