Ho una situazione orribile in cui devo ripristinare i dati dal sistema di raid danneggiato in un Debian Linux di salvataggio. Voglio solo montarli tutti su / mnt / rescue in modalità di sola lettura per poter copiare le immagini VMWare GSX su un'altra macchina e migrarle in seguito su ESXi. L'output per i comandi rilevanti è il seguente.
fdisk -l
Disk /dev/sda: 1500.3 GB, 1500301910016 bytes
255 heads, 63 sectors/track, 182401 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x0005e687
Device Boot Start End Blocks Id System
/dev/sda1 1 523 4200997 fd Linux raid autodetect
/dev/sda2 524 785 2104515 fd Linux raid autodetect
/dev/sda3 786 182401 1458830520 fd Linux raid autodetect
Disk /dev/sdb: 1500.3 GB, 1500301910016 bytes
255 heads, 63 sectors/track, 182401 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00014fc7
Device Boot Start End Blocks Id System
/dev/sdb1 1 523 4200997 fd Linux raid autodetect
/dev/sdb2 524 785 2104515 fd Linux raid autodetect
/dev/sdb3 786 182401 1458830520 fd Linux raid autodetect
Disk /dev/md0: 4301 MB, 4301717504 bytes
2 heads, 4 sectors/track, 1050224 cylinders
Units = cylinders of 8 * 512 = 4096 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
Disk /dev/md0 doesn't contain a valid partition table
Disk /dev/md1: 2154 MB, 2154954752 bytes
2 heads, 4 sectors/track, 526112 cylinders
Units = cylinders of 8 * 512 = 4096 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
Disk /dev/md1 doesn't contain a valid partition table
Stavo cercando di montare i dischi come segue.
mount -o ro /dev/sda1 /mnt/rescue
Quindi ottengo il seguente errore.
mount: unknown filesystem type 'linux_raid_member'
Anche indovinare il file system non sta andando bene.
mount -o ro -t ext3 /dev/sda1 /mnt/rescue/
mount: /dev/sda1 already mounted or /mnt/rescue/ busy
Quindi ho provato a creare un dispositivo virtuale come segue.
mdadm -A -R /dev/md9 /dev/sda1
Ciò si traduce nel seguente messaggio.
mdadm: cannot open device /dev/sda1: Device or resource busy
mdadm: /dev/sda1 has no superblock - assembly aborted
Ora mi sono perso, non ho idea di come recuperare i dischi e recuperare i dati. Quello che segue è l'output di mda --examine per tutti e 3 i dischi (penso che dovrebbe essere 3x dischi raid1).
/ Dev / sda1:
Magic : a92b4efc
Version : 0.90.00
UUID : 6708215c:6bfe075b:776c2c25:004bd7b2 (local to host rescue)
Creation Time : Mon Aug 31 17:18:11 2009
Raid Level : raid1
Used Dev Size : 4200896 (4.01 GiB 4.30 GB)
Array Size : 4200896 (4.01 GiB 4.30 GB)
Raid Devices : 3
Total Devices : 2
Preferred Minor : 0
Update Time : Sun Jun 2 00:58:05 2013
State : clean
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0
Checksum : 9070963e - correct
Events : 19720
Number Major Minor RaidDevice State
this 1 8 1 1 active sync /dev/sda1
0 0 0 0 0 removed
1 1 8 1 1 active sync /dev/sda1
2 2 8 17 2 active sync /dev/sdb1
/ Dev / sda2:
Magic : a92b4efc
Version : 0.90.00
UUID : e8f7960f:6bbea0c7:776c2c25:004bd7b2 (local to host rescue)
Creation Time : Mon Aug 31 17:18:11 2009
Raid Level : raid1
Used Dev Size : 2104448 (2.01 GiB 2.15 GB)
Array Size : 2104448 (2.01 GiB 2.15 GB)
Raid Devices : 3
Total Devices : 2
Preferred Minor : 1
Update Time : Sat Jun 8 07:14:24 2013
State : clean
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0
Checksum : 120869e1 - correct
Events : 3534
Number Major Minor RaidDevice State
this 1 8 2 1 active sync /dev/sda2
0 0 0 0 0 removed
1 1 8 2 1 active sync /dev/sda2
2 2 8 18 2 active sync /dev/sdb2
/ Dev / sda3:
Magic : a92b4efc
Version : 0.90.00
UUID : 4f2b3b67:c3837044:776c2c25:004bd7b2 (local to host rescue)
Creation Time : Mon Aug 31 17:18:11 2009
Raid Level : raid5
Used Dev Size : 1458830400 (1391.25 GiB 1493.84 GB)
Array Size : 2917660800 (2782.50 GiB 2987.68 GB)
Raid Devices : 3
Total Devices : 2
Preferred Minor : 2
Update Time : Sat Jun 8 14:47:00 2013
State : clean
Active Devices : 1
Working Devices : 1
Failed Devices : 1
Spare Devices : 0
Checksum : 2b2b2dad - correct
Events : 36343894
Layout : left-symmetric
Chunk Size : 64K
Number Major Minor RaidDevice State
this 1 8 3 1 active sync /dev/sda3
0 0 0 0 0 removed
1 1 8 3 1 active sync /dev/sda3
2 2 0 0 2 faulty removed
cat /proc/mdstat
Personalities : [raid1]
md2 : inactive sda3[1](S) sdb3[2](S)
2917660800 blocks
md1 : active raid1 sda2[1] sdb2[2]
2104448 blocks [3/2] [_UU]
md0 : active raid1 sda1[1] sdb1[2]
4200896 blocks [3/2] [_UU]
md2 sembra essere danneggiato ed è probabilmente il raid con le mie immagini VMWare.
Vorrei accedere ai dati da md2 (i dati sul disco attivo e non danneggiato, ovvero / dev / sda3) montandolo al di fuori del raid.
È una buona idea eseguire solo
mdadm --manage /dev/md2 --remove /dev/sda3
(funzionerebbe anche perché md2 non è visto da fdisk)?
Dovrei riassemblare gli altri raid md0 e md1 correndo
mdadm --assemble /dev/md0 /dev/sda1 /dev/sdb1
?
AGGIORNAMENTO 0: Non sono in grado di assemblare md0 e md2.
root@rescue ~ # mdadm --assemble /dev/md0 /dev/sda1 /dev/sdb1
mdadm: cannot open device /dev/sda1: Device or resource busy
mdadm: /dev/sda1 has no superblock - assembly aborted
root@rescue ~ # mdadm --assemble /dev/md2 /dev/sda3 /dev/sdb3
mdadm: cannot open device /dev/sda3: Device or resource busy
mdadm: /dev/sda3 has no superblock - assembly aborted
Il montaggio con mount -t auto non è possibile.
root@rescue ~ # mount -t auto -o ro /dev/md0 /mnt/rescue/
/dev/md0 looks like swapspace - not mounted
mount: you must specify the filesystem type
root@rescue ~ # mount -t auto -o ro /dev/md2 /mnt/rescue/
mount: you must specify the filesystem type
Il montaggio / dev / md1 funziona ma non vi sono dati VMWare su di esso.
root@rescue /mnt/rescue # ll
total 139M
-rw-r--r-- 1 root root 513K May 27 2010 abi-2.6.28-19-server
-rw-r--r-- 1 root root 631K Sep 16 2010 abi-2.6.32-24-server
-rw-r--r-- 1 root root 632K Oct 16 2010 abi-2.6.32-25-server
-rw-r--r-- 1 root root 632K Nov 24 2010 abi-2.6.32-26-server
-rw-r--r-- 1 root root 632K Dec 2 2010 abi-2.6.32-27-server
-rw-r--r-- 1 root root 632K Jan 11 2011 abi-2.6.32-28-server
-rw-r--r-- 1 root root 632K Feb 11 2011 abi-2.6.32-29-server
-rw-r--r-- 1 root root 632K Mar 2 2011 abi-2.6.32-30-server
-rw-r--r-- 1 root root 632K Jul 30 2011 abi-2.6.32-33-server
lrwxrwxrwx 1 root root 1 Aug 31 2009 boot -> .
-rw-r--r-- 1 root root 302K Aug 4 2010 coffee.bmp
-rw-r--r-- 1 root root 89K May 27 2010 config-2.6.28-19-server
...
AGGIORNAMENTO 1:
Ho provato a fermare md2 e md0 e assemblare ancora una volta.
mdadm -S /dev/md0
root@rescue ~ # mount -t auto -o ro /dev/md0 /mnt/rescue/
/dev/md0 looks like swapspace - not mounted
mount: you must specify the filesystem type
mdadm -S /dev/md2
root@rescue ~ # mount -t auto -o ro /dev/md2 /mnt/rescue/
mount: you must specify the filesystem type
Qualche idea?
AGGIORNAMENTO 2:
L'assemblaggio da un disco non funziona a causa del seguente messaggio di errore.
root@rescue ~ # mdadm -S /dev/md2
root@rescue ~ # mdadm --assemble /dev/md2 /dev/sda3
mdadm: /dev/md2 assembled from 1 drive - not enough to start the array.
root@rescue ~ # mdadm -S /dev/md2
mdadm: stopped /dev/md2
root@rescue ~ # mdadm --assemble /dev/md2 /dev/sdb3
mdadm: /dev/md2 assembled from 1 drive - not enough to start the array.
Anche il nuovo raid fallisce.
root@rescue ~ # mdadm -S /dev/md9
mdadm: stopped /dev/md9
root@rescue ~ # mdadm --assemble /dev/md9 /dev/sda3
mdadm: /dev/md9 assembled from 1 drive - not enough to start the array.
root@rescue ~ # mdadm -S /dev/md9
mdadm: stopped /dev/md9
root@rescue ~ # mdadm --assemble /dev/md9 /dev/sdb3
mdadm: /dev/md9 assembled from 1 drive - not enough to start the array.
Anche la creazione di un nuovo disco md non riesce.
root@rescue ~ # cat /proc/mdstat
Personalities : [raid1]
md0 : active raid1 sda1[1] sdb1[2]
4200896 blocks [3/2] [_UU]
md1 : active raid1 sda2[1] sdb2[2]
2104448 blocks [3/2] [_UU]
unused devices: <none>
root@rescue ~ # mdadm -A -R /dev/md9 /dev/sda3
mdadm: failed to RUN_ARRAY /dev/md9: Input/output error
mdadm: Not enough devices to start the array.
root@rescue ~ # cat /proc/mdstat
Personalities : [raid1] [raid6] [raid5] [raid4]
md9 : inactive sda3[1]
1458830400 blocks
md0 : active raid1 sda1[1] sdb1[2]
4200896 blocks [3/2] [_UU]
md1 : active raid1 sda2[1] sdb2[2]
2104448 blocks [3/2] [_UU]
unused devices: <none>
root@rescue ~ # mdadm -S /dev/md9
mdadm: stopped /dev/md9
root@rescue ~ # mdadm -A -R /dev/md9 /dev/sdb3
mdadm: failed to RUN_ARRAY /dev/md9: Input/output error
mdadm: Not enough devices to start the array.
AGGIORNAMENTO 3:
La rimozione di dischi da md2 non funziona.
mdadm --remove /dev/md2 /dev/sda3
mdadm: cannot get array info for /dev/md2
AGGIORNAMENTO 4:
Finalmente, correre insieme con si --force
spera lo abbia fatto. Ora sto copiando i file su un altro server.
mdadm --assemble /dev/md0 /dev/sda1 /dev/sdb1
mdadm: /dev/md0 has been started with 2 drives (out of 3).
Ma poi il montaggio fallisce (non conosco il tipo di file system). mount -o ro /dev/md0 /mnt/rescue
/dev/md0 looks like swapspace - not mounted
mount: you must specify the filesystem type
sd?1
è swapspace. Prova a montare md1
e md2
e montare con mount -t auto ...
.
mdadm --assemble
è la strada da percorrere. Prova senza--remove
.