Bug#385951: Fail to scan array in some case when partition is at
the end of the disk
Klaus Ethgen
Klaus at Ethgen.de
Mon Sep 4 08:05:22 UTC 2006
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Hash: SHA1
Package: mdadm
Version: 2.5.2-7
Severity: critical
Tha actual mdadm in testing makes the whole system to unbootable if on
raid slice is on the end of a disk. (In some cases)
My config:
- ---mdadm.conf---
DEVICE partitions
ARRAY /dev/md0 level=raid1 num-devices=2 UUID=88cf7fb7:6fab12d7:b713c983:af6eaca5
MAILADDR root
- ----------------
- ---hdc---
Disk /dev/hdc: 60.0 GB, 60060155904 bytes
16 heads, 63 sectors/track, 116374 cylinders
Units = cylinders of 1008 * 512 = 516096 bytes
Device Boot Start End Blocks Id System
/dev/hdc1 * 1 496 249983+ 83 Linux
/dev/hdc2 497 1488 499968 82 Linux swap / Solaris
/dev/hdc3 1489 116374 57902544 fd Linux raid autodetect
- ---------
- ---hdd---
Disk /dev/hdd: 320.0 GB, 320072933376 bytes
255 heads, 63 sectors/track, 38913 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/hdd1 1 9728 78140159+ 8e Linux LVM
/dev/hdd2 9729 19456 78140160 8e Linux LVM
/dev/hdd3 31705 38913 57906292+ fd Linux raid autodetect
- ---------
- ---/proc/mdstat---
Personalities : [raid1]
read_ahead 1024 sectors
md0 : active raid1 hdd3[0]
57902464 blocks [2/1] [U_]
unused devices: <none>
- ------------------
Please note that I had to run the raid in degraded mode as /dev/hdc3
cannot be in the array (See below).
When I do a "mdadm --assemble --scan --auto=yes" (as done in
/etc/init.d/mdadm-raid) then I get the following error:
- ---
mdadm: no recogniseable superblock on /dev/hda2
mdadm: /dev/hda2 has wrong uuid.
mdadm: no recogniseable superblock on /dev/hda1
mdadm: /dev/hda1 has wrong uuid.
mdadm: no recogniseable superblock on /dev/hda
mdadm: /dev/hda has wrong uuid.
mdadm: no RAID superblock on /dev/hdd2
mdadm: /dev/hdd2 has wrong uuid.
mdadm: no RAID superblock on /dev/hdd1
mdadm: /dev/hdd1 has wrong uuid.
mdadm: no RAID superblock on /dev/hdd
mdadm: /dev/hdd has wrong uuid.
mdadm: no RAID superblock on /dev/hdc2
mdadm: /dev/hdc2 has wrong uuid.
mdadm: no RAID superblock on /dev/hdc1
mdadm: /dev/hdc1 has wrong uuid.
mdadm: no RAID superblock on /dev/vg1/lv_hathi
mdadm: /dev/vg1/lv_hathi has wrong uuid.
mdadm: no RAID superblock on /dev/vg1/lv_misc
mdadm: /dev/vg1/lv_misc has wrong uuid.
mdadm: no RAID superblock on /dev/vg1/lv_mirror
mdadm: /dev/vg1/lv_mirror has wrong uuid.
mdadm: WARNING /dev/hdc3 and /dev/hdc appear to have very similar superblocks.
If they are really different, please --zero the superblock on one
If they are the same, please remove one from the list.
- ---
Cleaning the superblock of /dev/hdc also clean the one of /dev/hdc3 and
so leaving the raid in a degraded state. But at least I can now boot the
system after running the md0 by hand.
Note that the partition /dev/hdd3 is also at the end of the disk but do
not make problemes.
This is a very critical bug and should be fixed in etch (I think, this
is release critical!!!)
- -- Package-specific info:
- --- mount output
/dev/hda1 on / type ext3 (rw)
proc on /proc type proc (rw)
tmpfs on /dev/shm type tmpfs (rw)
devpts on /dev/pts type devpts (rw,gid=5,mode=620)
tmpfs on /tmp type tmpfs (rw,nosuid,nodev,mode=1777)
/dev/sysvg/lv_usr on /usr type ext3 (rw,noatime)
/dev/sysvg/lv_var on /var type reiserfs (rw)
/dev/sysvg/lv_local on /usr/local type ext3 (rw,noatime)
/dev/sysvg/lv_home on /home type reiserfs (rw,nosuid,nodev)
/dev/vg1/lv_misc on /misc type reiserfs (rw,nosuid,nodev)
/dev/vg1/lv_mirror on /mirror type reiserfs (rw,nosuid,nodev)
/dev/vg1/lv_hathi on /hathi type ext2 (ro)
capifs on /dev/capi type capifs (rw,mode=0666)
/proc/bus/usb on /proc/bus/usb type usbdevfs (rw)
AFS on /afs type afs (rw)
localhost:/var/lib/cfs/.cfsfs on /var/cfs type nfs (rw,port=3049,intr,nfsvers=2,addr=127.0.0.1)
binfmt_misc on /proc/sys/fs/binfmt_misc type binfmt_misc (rw)
- --- mdadm.conf
DEVICE partitions
ARRAY /dev/md0 level=raid1 num-devices=2 UUID=88cf7fb7:6fab12d7:b713c983:af6eaca5
MAILADDR root
- --- /proc/mdstat:
Personalities : [raid1]
read_ahead 1024 sectors
md0 : active raid1 hdd3[0]
57902464 blocks [2/1] [U_]
unused devices: <none>
- --- /proc/partitions:
major minor #blocks name rio rmerge rsect ruse wio wmerge wsect wuse running use aveq
9 0 57902464 md0 0 0 0 0 0 0 0 0 0 0 0
58 1 32768000 lvmb 0 0 0 0 0 0 0 0 0 0 0
58 2 6815744 lvmc 0 0 0 0 0 0 0 0 0 0 0
58 3 32669696 lvmd 0 0 0 0 0 0 0 0 0 0 0
58 4 36044800 lvme 0 0 0 0 0 0 0 0 0 0 0
58 5 5242880 lvmf 0 0 0 0 0 0 0 0 0 0 0
58 6 360448 lvmg 0 0 0 0 0 0 0 0 0 0 0
58 9 1048576 lvmj 0 0 0 0 0 0 0 0 0 0 0
22 0 58652496 hdc 288 2376 15528 2120 1127 7727 70854 8760 -20 582540 32154602
22 1 249983 hdc1 11 269 560 80 0 0 0 0 0 60 80
22 2 499968 hdc2 261 1815 14352 1890 1127 7727 70854 8760 0 4210 10670
22 3 57902544 hdc3 11 269 560 130 0 0 0 0 0 110 130
22 64 312571224 hdd 18594 122005 799916 834550 5509 12032 140304 934920 -8 581260 40123032
22 65 78140159 hdd1 11 269 560 120 0 0 0 0 0 100 120
22 66 78140160 hdd2 592 1287 7016 398410 2 0 16 0 0 3640 398410
22 67 57906292 hdd3 17985 120423 792276 435960 5507 12032 140288 934920 0 91900 1370880
3 0 39081623 hda 5080 21475 63598 21080 2274 12333 82500 16190 -21 582480 31594852
3 1 249007 hda1 4803 19552 48710 18560 1403 4347 11598 7410 0 13900 25970
3 2 498015 hda2 271 1881 14792 2450 871 7986 70902 8780 0 4270 11260
- --- initrd.img-2.4.32:
- --- /proc/modules:
raid1 13264 1 (autoclean)
md 58176 2 (autoclean) [raid1]
- --- /var/log/syslog:
Sep 4 09:45:09 ikki kernel: md: md driver 0.90.0 MAX_MD_DEVS=256, MD_SB_DISKS=27
Sep 4 09:45:09 ikki kernel: md: bind<hdd3,1>
Sep 4 09:45:09 ikki kernel: md: hdd3's event counter: 00000011
Sep 4 09:45:09 ikki kernel: md: raid1 personality registered as nr 3
Sep 4 09:45:09 ikki kernel: md: updating md0 RAID superblock on device
Sep 4 09:45:09 ikki kernel: md: hdd3 [events: 00000012]<6>(write) hdd3's sb offset: 57906176
Sep 4 09:45:09 ikki kernel: md: recovery thread got woken up ...
Sep 4 09:45:09 ikki kernel: md: recovery thread finished ...
- --- volume detail:
/dev/hdd3:
Magic : a92b4efc
Version : 00.90.00
UUID : 88cf7fb7:6fab12d7:b713c983:af6eaca5
Creation Time : Tue Jul 25 17:51:10 2006
Raid Level : raid1
Device Size : 57902464 (55.22 GiB 59.29 GB)
Array Size : 57902464 (55.22 GiB 59.29 GB)
Raid Devices : 2
Total Devices : 1
Preferred Minor : 0
Update Time : Mon Sep 4 09:44:43 2006
State : active
Active Devices : 1
Working Devices : 1
Failed Devices : 0
Spare Devices : 0
Checksum : 955df62d - correct
Events : 0.18
Number Major Minor RaidDevice State
this 0 22 67 0 active sync /dev/hdd3
0 0 22 67 0 active sync /dev/hdd3
1 1 0 0 1 faulty removed
- --
- -- System Information:
Debian Release: testing/unstable
APT prefers testing
APT policy: (700, 'testing'), (600, 'unstable'), (500, 'stable'), (60, 'experimental')
Architecture: i386 (i686)
Shell: /bin/sh linked to /bin/dash
Kernel: Linux 2.4.32
Locale: LANG=de_DE, LC_CTYPE=de_DE (charmap=ISO-8859-1) (ignored: LC_ALL set to de_DE)
Versions of packages mdadm depends on:
ii debconf [debconf-2.0] 1.5.3 Debian configuration management sy
ii libc6 2.3.6.ds1-4 GNU C Library: Shared libraries
ii lsb-base 3.1-14 Linux Standard Base 3.1 init scrip
ii makedev 2.3.1-82 creates device files in /dev
Versions of packages mdadm recommends:
ii exim4-daemon-heavy [mail-tran 4.63-3 exim MTA (v4) daemon with extended
- -- debconf information:
* mdadm/autostart: true
* mdadm/initrdstart: none
* mdadm/warning:
* mdadm/start_daemon: true
* mdadm/mail_to: root
* mdadm/autocheck: false
- --
Klaus Ethgen http://www.ethgen.de/
pub 2048R/D1A4EDE5 2000-02-26 Klaus Ethgen <Klaus at Ethgen.de>
Fingerprint: D7 67 71 C4 99 A6 D4 FE EA 40 30 57 3C 88 26 2B
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