[641] in linux-scsi channel archive
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daemon@ATHENA.MIT.EDU (Bernhard Kaindl)
Fri Sep 29 01:36:21 1995
Date: Thu, 28 Sep 1995 22:50:24 +0100 (MET)
From: Bernhard Kaindl <bkaindl@ping.at>
To: Linux SCSI List <linux-scsi@vger.rutgers.edu>
Along with other disks, I have two Quantum Prodrive 425 S (PD425S) in my
box.
Of the correctness of the following guesses I'm not sure:
These in means of physical temperature real hot disks recalibrate
themselves automatically during normal operation when accessed, and this
would not be noticed during normal use.
When these disks aren't accessed for a longer time, these recalibrations
may last a long time, since the disk does real amazing amounts of seeks
before it answers the request.
Linux times out on such a long response time, the read() fails and I get
these messages:
18:47:10 kernel: SCSI disk error : host 0 channel 0 id 0 lun 0 return code = 2
18:47:10 kernel: scsidisk I/O error: dev 08:00, sector 0
18:47:58 kernel: Weird - unlocked, clean and not uptodate buffer on list \
0 08:00 0
18:47:58 last message repeated 3 times
Can this be fixed without hurting other things ?
Probably a structurce(some sort of blacklist) for such disks may be ok.
Any comments ?
Info: kernels: 1.1.72, 1.2.10, 1.3.29, Boot message of this disk:
Vendor: QUANTUM Model: PD425S Rev: 606_
Type: Direct-Access ANSI SCSI revision: 02
Bernhard Kaindl
