Public bug reported:
Binary package hint: mdadm
Ubuntu server 6.06.1 i386
# mdadm --version; uname -a
mdadm - v1.12.0 - 14 June 2005
Linux server 2.6.15-27-server #1 SMP Fri Dec 8 18:43:54 UTC 2006 i686 GNU/Linux
# mdadm --query /dev/md0
/dev/md0: 7.45GiB raid1 2 devices, 0 spares. Use mdadm --detail for more detail.
/dev/md0: No md super block found, not an md component.
Please, notice message "/dev/md0: No md super block found, not an md
component." in mdadm command answer. I think it is a bug as when I add "
--detail" switch, mdadm reports that "Superblock is persistent".
Somethingh has to be wrong here.
More details:
# cat /proc/mdstat
Personalities : [raid1]
md1 : active raid1 hdc6[2] hda6[0]
283161536 blocks [2/1] [U_]
[===>.................] recovery = 15.1% (42771328/283161536)
finish=116.6min speed=34330K/sec
md0 : active raid1 hdc5[1] hda5[0]
7815488 blocks [2/2] [UU]
unused devices: <none>
# mdadm --query /dev/md0
/dev/md0: 7.45GiB raid1 2 devices, 0 spares. Use mdadm --detail for more detail.
/dev/md0: No md super block found, not an md component.
# mdadm --query --detail /dev/md0
/dev/md0:
Version : 00.90.03
Creation Time : Sun Dec 31 14:14:38 2006
Raid Level : raid1
Array Size : 7815488 (7.45 GiB 8.00 GB)
Device Size : 7815488 (7.45 GiB 8.00 GB)
Raid Devices : 2
Total Devices : 2
Preferred Minor : 0
Persistence : Superblock is persistent
Update Time : Mon Jan 1 16:03:34 2007
State : clean
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0
UUID : 1db5229c:5ef0b957:3f02ce46:bbdbd39c
Events : 0.52971
Number Major Minor RaidDevice State
0 3 5 0 active sync /dev/hda5
1 22 5 1 active sync /dev/hdc5
# mount | grep md0
/dev/md0 on / type ext3 (rw,errors=remount-ro)
I see the same behavior on /dev/md1.
I build this md array with Ubuntu server 6.06.1 i386 install CD, I used
only one disk during installation, so RAID1 was configured as "degraded
(1 disk of 2)". I copied data from original disk to the new RAID aray
and I am now updating RAID array to use 2 disks. I think this
information is not not interested for this bug report...
** Affects: mdadm (Ubuntu)
Importance: Undecided
Status: Unconfirmed
** Description changed:
Binary package hint: mdadm
Ubuntu server 6.06.1 i386
# mdadm --version; uname -a
mdadm - v1.12.0 - 14 June 2005
Linux server 2.6.15-27-server #1 SMP Fri Dec 8 18:43:54 UTC 2006 i686
GNU/Linux
# mdadm --query /dev/md0
/dev/md0: 7.45GiB raid1 2 devices, 0 spares. Use mdadm --detail for more
detail.
/dev/md0: No md super block found, not an md component.
Please, notice message "/dev/md0: No md super block found, not an md
component." in mdadm command answer. I think it is a bug as when I add "
--detail" switch, mdadm reports that "Superblock is persistent".
Somethingh has to be wrong here.
More details:
# cat /proc/mdstat
Personalities : [raid1]
md1 : active raid1 hdc6[2] hda6[0]
283161536 blocks [2/1] [U_]
[===>.................] recovery = 15.1% (42771328/283161536)
finish=116.6min speed=34330K/sec
md0 : active raid1 hdc5[1] hda5[0]
7815488 blocks [2/2] [UU]
unused devices: <none>
# mdadm --query /dev/md0
/dev/md0: 7.45GiB raid1 2 devices, 0 spares. Use mdadm --detail for more
detail.
/dev/md0: No md super block found, not an md component.
# mdadm --query --detail /dev/md0
/dev/md0:
Version : 00.90.03
Creation Time : Sun Dec 31 14:14:38 2006
Raid Level : raid1
Array Size : 7815488 (7.45 GiB 8.00 GB)
Device Size : 7815488 (7.45 GiB 8.00 GB)
Raid Devices : 2
Total Devices : 2
Preferred Minor : 0
Persistence : Superblock is persistent
Update Time : Mon Jan 1 16:03:34 2007
State : clean
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0
UUID : 1db5229c:5ef0b957:3f02ce46:bbdbd39c
Events : 0.52971
Number Major Minor RaidDevice State
0 3 5 0 active sync /dev/hda5
1 22 5 1 active sync /dev/hdc5
+ # mount | grep md0
+ /dev/md0 on / type ext3 (rw,errors=remount-ro)
+
+ I see the same behavior on /dev/md1.
+
I build this md array with Ubuntu server 6.06.1 i386 install CD, I used
only one disk during installation, so RAID1 was configured as "degraded
(1 disk of 2)". I copied data from original disk to the new RAID aray
and I am now updating RAID array to use 2 disks. I think this
information is not not interested for this bug report...
--
mdadm reports "/dev/md0: No md super block found, not an md component."
https://launchpad.net/bugs/77609
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