[ILUG] Raid 1 boot error

[Conor Daly]

On Thu, Dec 16, 2004 at 12:08:47PM +0000 or so it is rumoured hereabouts, 
John Madden thought:
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> On (16/12/04 11:54), Frank Murphy didst pronounce:
> > 
> > mkfs -t ext3 /dev/hdb1 (hdc1)
> > 
> > mdadm --create /dev/md0 --level=0 --raid-devices=2 /dev/hdb1 /dev/hdc1
> > 
> > (it believed partitions to be ext2, fdisk-l shows type 83)
> > 
> Don't you have to create the filesystem on the RAID device, not on the
> individual partitions being used for it? I think a mke2fs -j /dev/md0
> should fix your problems. Note, this will wipe any data on the two
> partitions in md0.

The way to avoid wiping data {only in a raid 1 setup} is to mark the disk
with the data as a 'failed-disk', mount it elsewhere, mkfs /dev/md0, cp -a
the failed disk into the raid fs, then mark the failed disk as ok.  I used
this to convert a single disk to half of a raid set after the OS had been
installed.

Conor
-- 
Conor Daly <conor.daly at oceanfree.net>

Domestic Sysadmin :-)
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