Public bug reported:
Binary package hint: mdadm
I've had this problem happen a few times in the past with previous versions of
Ubuntu. (I'm now on Lucid) I forget how I got rid of it then. What happened now
is a just added a couple of eSATA disks (/dev/sdd and /dev/sde) (they function
like regular SATA disks.) I had setup my /dev/md0 array from /dev/sdb and
/dev/sdc months ago. Now all of a sudden it fabricates a /dev/md_d0 array
somehow (based on /dev/md0p1) and the system fails to mount /dev/md0p1. This is
the output from cat /proc/mdstat:
m...@hegemon:~$ cat /proc/mdstat
Personalities : [linear] [raid1] [multipath] [raid0] [raid6] [raid5] [raid4]
[raid10]
md_d0 : inactive md0p1[1](S)
245111616 blocks
md0 : active raid1 sdc[1] sdb[0]
245117312 blocks [2/2] [UU]
unused devices: <none>
My workaround for now is to manually remove /md_d0 every time I reboot the
system as follows:
m...@hegemon:~$ sudo mdadm --manage --stop /dev/md_d0
mdadm: stopped /dev/md_d0
I can then run mount -a and it successfully mounts /dev/md0p1
I get this output after deleting the array, I believe it is the same as before
I delete it:
m...@hegemon:~$ sudo ls /dev/md*
/dev/md0 /dev/md_d0 /dev/md_d0p2 /dev/md_d0p4
/dev/md0p1 /dev/md_d0p1 /dev/md_d0p3
/dev/md:
d0 d0p1 d0p2 d0p3 d0p4
ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: mdadm 2.6.7.1-1ubuntu15
ProcVersionSignature: Ubuntu 2.6.32-24.39-generic 2.6.32.15+drm33.5
Uname: Linux 2.6.32-24-generic x86_64
Architecture: amd64
Date: Sun Aug 8 21:05:33 2010
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release amd64 (20100429)
MDadmExamine.dev.sda: Error: command ['/sbin/mdadm', '-E', '/dev/sda'] failed
with exit code 1: mdadm: No md superblock detected on /dev/sda.
MDadmExamine.dev.sda1: Error: command ['/sbin/mdadm', '-E', '/dev/sda1'] failed
with exit code 1: mdadm: No md superblock detected on /dev/sda1.
MDadmExamine.dev.sda2: Error: command ['/sbin/mdadm', '-E', '/dev/sda2'] failed
with exit code 1: mdadm: No md superblock detected on /dev/sda2.
MDadmExamine.dev.sda3: Error: command ['/sbin/mdadm', '-E', '/dev/sda3'] failed
with exit code 1: mdadm: No md superblock detected on /dev/sda3.
MDadmExamine.dev.sda5: Error: command ['/sbin/mdadm', '-E', '/dev/sda5'] failed
with exit code 1: mdadm: No md superblock detected on /dev/sda5.
MDadmExamine.dev.sdd: Error: command ['/sbin/mdadm', '-E', '/dev/sdd'] failed
with exit code 1: mdadm: No md superblock detected on /dev/sdd.
MDadmExamine.dev.sdd1: Error: command ['/sbin/mdadm', '-E', '/dev/sdd1'] failed
with exit code 1: mdadm: No md superblock detected on /dev/sdd1.
MDadmExamine.dev.sde: Error: command ['/sbin/mdadm', '-E', '/dev/sde'] failed
with exit code 1: mdadm: No md superblock detected on /dev/sde.
MDadmExamine.dev.sde1: Error: command ['/sbin/mdadm', '-E', '/dev/sde1'] failed
with exit code 1: mdadm: No md superblock detected on /dev/sde1.
MachineType: Gigabyte Technology Co., Ltd. 965P-S3
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.32-24-generic
root=UUID=6a13dd7d-05c7-4f03-af14-031d3821217b ro quiet splash
ProcEnviron:
PATH=(custom, no user)
LANG=en_US.utf8
SHELL=/bin/bash
ProcMDstat:
Personalities : [linear] [raid1] [multipath] [raid0] [raid6] [raid5] [raid4]
[raid10]
md0 : active raid1 sdc[1] sdb[0]
245117312 blocks [2/2] [UU]
unused devices: <none>
SourcePackage: mdadm
dmi.bios.date: 06/25/2009
dmi.bios.vendor: Award Software International, Inc.
dmi.bios.version: F14
dmi.board.name: 965P-S3
dmi.board.vendor: Gigabyte Technology Co., Ltd.
dmi.chassis.type: 3
dmi.chassis.vendor: Gigabyte Technology Co., Ltd.
dmi.modalias:
dmi:bvnAwardSoftwareInternational,Inc.:bvrF14:bd06/25/2009:svnGigabyteTechnologyCo.,Ltd.:pn965P-S3:pvr:rvnGigabyteTechnologyCo.,Ltd.:rn965P-S3:rvr:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvr:
dmi.product.name: 965P-S3
dmi.sys.vendor: Gigabyte Technology Co., Ltd.
etc.blkid.tab: Error: [Errno 2] No such file or directory: '/etc/blkid.tab'
** Affects: mdadm (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug lucid mdadm raid
--
md_d0 array fabricated, prevents mounting md0 partitions
https://bugs.launchpad.net/bugs/615186
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