very slow scsi disk after reboot

[Pat Mahoney <pmahoney@uiuc.edu>]

I'm runnind debian hppa with kernel 2.4.18 on a HP B2000 with 4GB
Fast-20 scsi disk.  The headless machine froze up, and upon reboot the
scsi disk ran (and still is running) very slowly:

$ hdparm -Tt /dev/sda

/dev/sda:
Timing buffer-cache reads:   128 MB in  1.82 seconds = 70.33 MB/sec
Timing buffered disk reads:  64 MB in 511.14 seconds =128.22 kB/sec

(Yes, that's kB)

I'm not sure what how to go about solving this problem, so I'd
appreciate any help.  I can't see anything that looks like an error
message in dmesg output or syslog.

(please cc as I'm not subscribed)

-- 
Pat Mahoney	<pmahoney@uiuc.edu>