[950] in linux-scsi channel archive
Re: MD + NCR 53c7,8xx driver = death
daemon@ATHENA.MIT.EDU (Dan Hollis)
Sat Nov 16 22:31:18 1996
Date: Sat, 16 Nov 1996 18:06:30 -0800 (PST)
From: Dan Hollis <goemon@sasami.anime.net>
To: Gerard Roudier <groudier@club-internet.fr>
cc: linux-scsi@vger.rutgers.edu, linux-raid@vger.rutgers.edu
In-Reply-To: <Pine.LNX.3.91.961117004116.509A-100000@localhost>
On Sun, 17 Nov 1996, Gerard Roudier wrote:
> Can you give a try with tagged command queuing enabled in Linux config.
> In this case, the ncr53c8xx driver will allocate 4 control block per
> device that supports tagged commands and in my opinion your drives do
> support this feature.
> (It allocates 1 control block at a time on command completion, so 4 scsi
> command completions will be necessary in order to allocate 4 control blocks)
This made no difference at all.
The ncr53c8xx driver reported tagged queuing depth of 4 on all devices,
yet it still had no problems. It was able to survive mkfs, bonnie, iozone,
and anything else I could throw at it.
The 53c7xx,8xx driver still has problems. mkfs, bonnie and iozone will
kill it guaranteed within several seconds.
-Dan
