sector going bad on hard disk

["Brenda J. Butler" <bjb@achilles.net>]

For a few days, access to a certain file (/home/bjb/Mail/family)
was slow at a certain point in the file.  Now, access to that file
gives the following error:

scsi0: MEDIUM ERROR on channel 0, id1, lun0, CDB: Request Sense 00 00 00 10 00
Current error sd08:01: sense key Medium Error
Additional sense indicates Unrecovered read error
scsidisk I/O error: dev 08:01, sector 109150


I wonder what I can do to "mark that sector as bad" and not use it.

I tried fsck /home, but fsck returns no errors.


My system is a Sparc Station 20, with a pair of 2 Gig hard disks.
The /home filesystem shares a whole hard disk with a swap partition.
The disks are SEAGATE model ST32430W SUN 2.1G disks, Rev 0666,
Type:  Direct-Access ANSI SCSI revision:  02  according to dmesg.

esp0: target 1[period 100ns offset 15 10.00MHz FAST SCSI-II]
SCSI device sda: hdwr sector= 512 bytes.  Sectors= 4197405 (2049MB) [2.0 GB]
esp0: target 3[period 100ns offset 15 10.00MHz FAST SCSI-II]
SCSI device sdb: hdwr sector= 512 bytes.  Sectors= 4197405 (2049MB) [2.0 GB]

Also, the partition check does not report anything unusual.



Oh, and what's the best way to back up that filesystem, all except
for the one file that gives errors?

thanks in advance

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bjb@achilles.net
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