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Old 06-23-2002, 10:59 AM   #1
nabil
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Registered: Feb 2001
Location: MI, USA
Distribution: Debian Linux 100% GNU
Posts: 210

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Software Raid1 has failed in Redhat 7.2


Hello,
I had to reboot my server due to network card problems and now it appears that I have lost software raid1 functionality on disk A :

Personalities : [raid1]
read_ahead 1024 sectors
md0 : active raid1 sdb1[1]
8433984 blocks [2/1] [_U]
I don't think there is any problems with sda1 but it's no longer mirroring or showing active in md config????

How do I fix that ???? without destroying my data on the only copy on sdb1 now.
 
Old 06-23-2002, 11:50 AM   #2
nabil
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Registered: Feb 2001
Location: MI, USA
Distribution: Debian Linux 100% GNU
Posts: 210

Original Poster
Rep: Reputation: 31
Here is what shows up on syslog:

scsi0 : Adaptec AHA274x/284x/294x (EISA/VLB/PCI-Fast SCSI) 5.2.4/5.2.0
<Adaptec AIC-7892 Ultra 160/m SCSI host adapter>
Vendor: SEAGATE Model: ST39204LW Rev: 0002
Type: Direct-Access ANSI SCSI revision: 03
Vendor: SEAGATE Model: ST39204LW Rev: 0002
Type: Direct-Access ANSI SCSI revision: 03
Vendor: IBM Model: CDRM00103 !I Rev: 1.0g
Type: CD-ROM ANSI SCSI revision: 02
Attached scsi disk sda at scsi0, channel 0, id 0, lun 0
Attached scsi disk sdb at scsi0, channel 0, id 1, lun 0
(scsi0:0:0:0) Synchronous at 160.0 Mbyte/sec, offset 63.
SCSI device sda: 17921835 512-byte hdwr sectors (9176 MB)

Partition check:
sda: sda1 sda2
(scsi0:0:1:0) Synchronous at 160.0 Mbyte/sec, offset 63.
SCSI device sdb: 17921835 512-byte hdwr sectors (9176 MB)
sdb: sdb1 sdb2
md: raid1 personality registered as nr 3
Journalled Block Device driver loaded
md: Autodetecting RAID arrays.
(read) sda1's sb offset: 8433984 [events: 0000007c]
(read) sdb1's sb offset: 8433984 [events: 0000007e]
md: autorun ...
md: considering sdb1 ...
md: adding sdb1 ...
md: adding sda1 ...
md: created md0
md: bind<sda1,1>
md: bind<sdb1,2>
md: running: <sdb1><sda1>
md: sdb1's event counter: 0000007e
md: sda1's event counter: 0000007c
md: superblock update time inconsistency -- using the most recent one
md: freshest: sdb1
md: kicking non-fresh sda1 from array!
md: unbind<sda1,1>
md: export_rdev(sda1)
md0: removing former faulty sda1!
md: md0: raid array is not clean -- starting background reconstruction
RAID level 1 does not need chunksize! Continuing anyway.
md0: max total readahead window set to 124k
md0: 1 data-disks, max readahead per data-disk: 124k
raid1: device sdb1 operational as mirror 1
raid1: md0, not all disks are operational -- trying to recover array
raid1: raid set md0 active with 1 out of 2 mirrors
md: recovery thread got woken up ...
md0: no spare disk to reconstruct array! -- continuing in degraded mode
md: recovery thread finished ...
md: updating md0 RAID superblock on device
md: sdb1 [events: 0000007f](write) sdb1's sb offset: 8433984
md: ... autorun DONE.

Last edited by nabil; 06-23-2002 at 11:51 AM.
 
  


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