Setting up mdadm.conf for UUID?

2006-07-07 Thread Ewan Grantham 

My RAID-5 array is composed of six USB drives. Unfortunately, my
Ubuntu Dapper system doesn't always assign the same devices to the
drives after a reboot. However, mdadm doesn't seem to like having an
mdadm.conf that doesn't have a Devices line with specified device
names.

Anyway to setup an mdadm.conf so that it will just assemble the drives
using the UUID of the array? Or is the trick to not have an mdadm.conf
and add something to a runlevel script?

TIA,
Ewan
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Re: Setting up mdadm.conf for UUID?

2006-07-07 Thread Neil Brown 
On Friday July 7, [EMAIL PROTECTED] wrote:
 My RAID-5 array is composed of six USB drives. Unfortunately, my
 Ubuntu Dapper system doesn't always assign the same devices to the
 drives after a reboot. However, mdadm doesn't seem to like having an
 mdadm.conf that doesn't have a Devices line with specified device
 names.

Sure it does

  DEVICE /dev/sd*
or 
  DEVICE partitions

 
 Anyway to setup an mdadm.conf so that it will just assemble the drives
 using the UUID of the array? Or is the trick to not have an mdadm.conf
 and add something to a runlevel script?
 

Yes.

 DEVICE partitions
 ARRAY /dev/md0 UUID=what:ever:it:ius
 ARRAY /dev/md1 UUID=uuid:for:md:one

NeilBrown
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