[8423] in linux-scsi channel archive
SCSI retries and cable pulls.
daemon@ATHENA.MIT.EDU (Thomas A. Szybist)
Mon Mar 20 11:22:55 2000
Date: Mon, 20 Mar 2000 10:14:09 -0500
From: "Thomas A. Szybist" <tom@szybist.com>
To: linux-scsi@vger.rutgers.edu
Message-ID: <20000320101409.A2640@cc304609-a.vron1.nj.home.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Hello,
I've been following the discussions concerning scsi retries. I was
hoping someone could shed some light on this issue. I'm using Red Hat
6.1 with adaptec 2940UW controllers.
If I pull a cable during the middle of mke2fs for instance, It seemed like
retries would go on and on. Looking closer, it seems that each buffer
in the request is individually marked not uptodate, the command is then
requeued minus that buffer. This happens until there are no more buffers.
It also looks like I can have a lot of requests to do this for. So it
seems to take a long time, on the order of hours.
While this is going on, I can't seem to write to other disks.
I believe this creates a problem with md. I was testing mirroring with
two drives on different controllers. When I yank cable, I just get a
slew of messages, (retries, bus resets) and writes don't seem to continue
to the other drive.
Also is there any reason *not* to use the new error handling code?
Thanks for any help,
Tom Szybist
-
To unsubscribe from this list: send the line "unsubscribe linux-scsi" in
the body of a message to majordomo@vger.rutgers.edu
