Skip site navigation (1)Skip section navigation (2)
Date:      Wed, 14 Oct 1998 16:26:35 -0600 (MDT)
From:      "Kenneth D. Merry" <ken@plutotech.com>
To:        smace@intt.ORG (Scott Mace)
Cc:        cvs-committers@FreeBSD.ORG, cvs-all@FreeBSD.ORG, martin@tdc.on.ca
Subject:   Re: cvs commit: src/sys/cam cam_xpt.c
Message-ID:  <199810142226.QAA12957@panzer.plutotech.com>
In-Reply-To: <199810142212.RAA21293@metal.intt.org> from Scott Mace at "Oct 14, 98 05:12:49 pm"

next in thread | previous in thread | raw e-mail | index | archive | help
Scott Mace wrote...
> > ken         1998/10/14 14:17:40 PDT
> > 
> >   Modified files:
> >     sys/cam              cam_xpt.c 
> >   Log:
> >   Disable tagged queueing for the Seagate Elite 9GB drives.  They tend to get
> >   hung up when you send tags to them too quickly.  (CAM is able to recover
> >   from the problem, but this just avoids it altogether.)
> >   
> >   Reviewed by:	gibbs
> >   Reported by:	Bret Ford <bford@uop.cs.uop.edu>
> >   	and:	Martin Renters <martin@tdc.on.ca>
> >   
> >   Revision  Changes    Path
> >   1.21      +10 -1     src/sys/cam/cam_xpt.c
> > 
> 
> This is odd, I have 2 elite 9's and they run fine 
> with tagged queuing.  What rev are the drives that fail?
> What are the symptoms exactly (maybe they don't run fine ?@?)

Well, Bret Ford reported the following inquiry info:

SEAGATE ST410800N 7110

Martin Renters hasn't yet sent me dmesg information.  What firmware
revision do you have?

The symptoms are that the drive just kinda locks up after heavy I/O.  We
hit it with a BDR after a minute and it comes back.

> In fact without tagged quueing they have very slow performance.

I'm sure they do.

If we can track it down to a specific firmware revision, we can narrow the
quirk entry a little more.

Ken
-- 
Kenneth Merry
ken@plutotech.com

To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe cvs-all" in the body of the message



Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?199810142226.QAA12957>