From: Bruce Pinsky <bep@whack.org>
To: linux-raid@vger.kernel.org
Subject: RAID strangeness
Date: Tue, 27 May 2003 00:36:43 -0700 [thread overview]
Message-ID: <3ED3158B.3080200@whack.org> (raw)
I have a four disk RAID 5 array running on my SPARC 10 running Debian
3.0+ (2.4.20 kernel) and RAID raidtools-0.90 with this raidtab:
raiddev /dev/md0
raid-level 5
nr-raid-disks 4
nr-spare-disks 0
persistent-superblock 1
parity-algorithm left-symmetric
chunk-size 32
device /dev/sdc1
raid-disk 0
device /dev/sdd1
raid-disk 1
device /dev/sde1
raid-disk 2
device /dev/sdf1
raid-disk 3
It was up and running for more than a month until this weekend. My
system rebooted unexpectedly (looks like a power failure at this point)
and when it rebooted I got this message:
raid5: measuring checksumming speed
8regs : 60.000 MB/sec
32regs : 62.400 MB/sec
SPARC : 81.600 MB/sec
raid5: using function: SPARC (81.600 MB/sec)
md: md driver 0.90.0 MAX_MD_DEVS=256, MD_SB_DISKS=27
md: raid5 personality registered as nr 4
md: could not lock sdc1, zero-size? Marking faulty.
md: could not import sdc1!
md: autostart sdc1 failed!
Investigation has led me to think that my partition tables have
disappeared based on this:
son-of-spike:/usr/share/doc/raidtools2# fdisk -l
Disk /dev/sda (Sun disk label): 3 heads, 415 sectors, 14382 cylinders
Units = cylinders of 1245 * 512 bytes
Device Flag Start End Blocks Id System
/dev/sda1 1 7191 4475775 83 Linux native
/dev/sda2 7192 14382 4475775 83 Linux native
/dev/sda3 0 14382 8952795 5 Whole disk
Disk /dev/sdb (Sun disk label): 11 heads, 108 sectors, 3528 cylinders
Units = cylinders of 1188 * 512 bytes
Device Flag Start End Blocks Id System
/dev/sdb1 1 259 153252 83 Linux native
/dev/sdb2 u 260 701 261954 82 Linux swap
/dev/sdb3 0 3528 2095632 5 Whole disk
/dev/sdb7 702 3528 1678644 83 Linux native
Disk /dev/sdc: 64 heads, 32 sectors, 8683 cylinders
Units = cylinders of 2048 * 512 bytes
Disk /dev/sdc doesn't contain a valid partition table
Disk /dev/sdd: 64 heads, 32 sectors, 8683 cylinders
Units = cylinders of 2048 * 512 bytes
Disk /dev/sdd doesn't contain a valid partition table
Disk /dev/sde: 64 heads, 32 sectors, 8683 cylinders
Units = cylinders of 2048 * 512 bytes
Disk /dev/sde doesn't contain a valid partition table
Disk /dev/sdf: 64 heads, 32 sectors, 8683 cylinders
Units = cylinders of 2048 * 512 bytes
Disk /dev/sdf doesn't contain a valid partition table
Thankfully nothing too important on the array yet, but I'm concerned for
when I do put stuff on it. Anyone seen a situation where the array
craps and the partition tables are missing? Can it be recovered?
Something wrong with my RAID setup?
Thanks for the help...
--
==========
bep
next reply other threads:[~2003-05-27 7:36 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-05-27 7:36 Bruce Pinsky [this message]
2003-05-27 7:23 ` RAID strangeness Andre' Breiler
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