DegradedArray event (RAID-1, LVM, Ubuntu 6.06 Server)

[V D]

Hi,

First of all sorry but I'm definitely not an expert.

I received two mail alerts at the same time but I don't know how to fix that.
    DegradedArray event on /dev/md0:xxx
    DegradedArray event on /dev/md1:xxx

I have two identical discs in RAID-1 (with LVM, configured during the
installation of an Ubuntu 6.06 Server Edition).

Should I first try to "recover from a multiple disk failure" using
"mdadm --assemble --force", as explained at
http://unthought.net/Software-RAID.HOWTO/Software-RAID.HOWTO-8.html ?
Is there a problem if I don't have a file /etc/raidtab?

Some more info. Tell me if you need more.

root at xxx:~# cat /proc/mdstat
Personalities : [raid1]
md1 : active raid1 sda2[0]
     292800576 blocks [2/1] [U_]

md0 : active raid1 sda1[0]
     248896 blocks [2/1] [U_]

unused devices: <none>

root at xxx:~# mdadm -Ebsc partitions
ARRAY /dev/md1 level=raid1 num-devices=2
UUID=9fcf243c:30c2ce54:c74d1712:d475f80e
ARRAY /dev/md0 level=raid1 num-devices=2
UUID=86da249a:2ebb925b:0385cfa1:3db65b97

root at xxx:~# mdadm --detail /dev/md0
/dev/md0:
       Version : 00.90.03
 Creation Time : Wed Jun  7 14:54:31 2006
    Raid Level : raid1
    Array Size : 248896 (243.10 MiB 254.87 MB)
   Device Size : 248896 (243.10 MiB 254.87 MB)
  Raid Devices : 2
 Total Devices : 1
Preferred Minor : 0
   Persistence : Superblock is persistent

   Update Time : Mon Nov 27 06:27:05 2006
         State : clean, degraded
 Active Devices : 1
Working Devices : 1
 Failed Devices : 0
 Spare Devices : 0

          UUID : 86da249a:2ebb925b:0385cfa1:3db65b97
        Events : 0.749

   Number   Major   Minor   RaidDevice State
      0       8        1        0      active sync   /dev/sda1
      1       0        0        -      removed

root at xxx:~# mdadm --detail /dev/md1
/dev/md1:
       Version : 00.90.03
 Creation Time : Wed Jun  7 14:54:40 2006
    Raid Level : raid1
    Array Size : 292800576 (279.24 GiB 299.83 GB)
   Device Size : 292800576 (279.24 GiB 299.83 GB)
  Raid Devices : 2
 Total Devices : 1
Preferred Minor : 1
   Persistence : Superblock is persistent

   Update Time : Mon Nov 27 12:07:51 2006
         State : clean, degraded
 Active Devices : 1
Working Devices : 1
 Failed Devices : 0
 Spare Devices : 0

          UUID : 9fcf243c:30c2ce54:c74d1712:d475f80e
        Events : 0.3079132

   Number   Major   Minor   RaidDevice State
      0       8        2        0      active sync   /dev/sda2
      1       0        0        -      removed


Thank you in advance for you help,
Vincent