Very Computer

Dan Warren

Here is the setup:
Pentium 350 / 128 Mb SDRAM
Adaptec 2940UW
2 Seagate ST34520W 4.5Gb SCSI-2 hard drives
Red Hat 5.2 (2.0.36)
Raidtools-0.5beta1

Errors:
Apr 21 00:05:10 andromeda kernel: scsi0: MEDIUM ERROR on channel 0, id
15, lun 0
, CDB: Read (10) 00 00 41 af 45 00 00 26 00
Apr 21 00:05:10 andromeda kernel: Current error sd08:11: sense key
Medium Error
Apr 21 00:05:10 andromeda kernel: Additional sense indicates Unrecovered
read er
ror
Apr 21 00:05:10 andromeda kernel: scsidisk I/O error: dev 08:11, sector
4304682,
 absolute sector 4304745
Apr 21 00:05:10 andromeda kernel: RAID1: Disk failure on 08:11,
disabling device
.Operation continuing on 1 devices
Apr 21 00:05:10 andromeda kernel: raid1: 09:00: rescheduling block
2152341
Apr 21 00:05:10 andromeda kernel: md: updating raid superblock on device
08:01,
sb_offset == 4441856
Apr 21 00:05:10 andromeda kernel: md: updating raid superblock on device
08:11,
sb_offset == 4441856
Apr 21 00:05:10 andromeda kernel: raid1: 09:00: redirecting sector
2152341 to an
other mirror

The reason why it gives you the message is the same reason why a*pit
light comes on when one engine fails: because the system thinks you
might be interested in fixing the problem.

I assume you have the kernel sources.  Even if you're not a C whiz, try
looking in drivers/block/raid1.c, and look at the code (and even
comments) near to the messages which you're getting.  Another form of
documentation not available to binary-only OS users !

Good luck.  (Most of us run on one engine all the time.  We'd be in the
sea by now.)

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