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The 4 gig version of the Seagate Medalist Pro seems to have the same

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trouble with tagged queueing as the 6.5 gig version.

So, I've added a quirk entry for it to limit it to two outstanding
transactions at a time, just like the 6.5G version.  While I'm at it, add a
quirk for the 9G version of the drive, since it most likely has the same
problem.

Submitted by:	Jeremy Lea <reg@shale.csir.co.za>
This commit is contained in:
Kenneth D. Merry 1999-03-07 22:48:50 +00:00
parent 989fb3947c
commit c816e0254c
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=44567
1 changed files with 21 additions and 5 deletions
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26
sys/cam/cam_xpt.c
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@ -26,7 +26,7 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: cam_xpt.c,v 1.45 1999/02/26 18:38:06 ken Exp $
* $Id: cam_xpt.c,v 1.46 1999/03/05 23:18:16 gibbs Exp $
*/
#include <sys/param.h>
#include <sys/systm.h>
@ -308,17 +308,33 @@ static struct xpt_quirk_entry xpt_quirk_table[] =
{ T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST410800*", "71*" },
/*quirks*/0, /*mintags*/0, /*maxtags*/0
},
{
/*
* Broken tagged queueing drive. (Write performance is
* very bad with anything more than 2 tags.
*
* The Seagate Medalist Pro drives have very poor write
* performance with anything more than 2 tags.
*
* Reported by: Paul van der Zwan <paulz@trantor.xs4all.nl>
* Drive: <SEAGATE ST36530N 1444>
*
* Reported by: Jeremy Lea <reg@shale.csir.co.za>
* Drive: <SEAGATE ST34520W 1281>
*
* No one has actually reported that the 9G version
* (ST39140*) of the Medalist Pro has the same problem, but
* we're assuming that it does because the 4G and 6.5G
* versions of the drive are broken.
*/
{
{ T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST34520*", "*"},
/*quirks*/0, /*mintags*/2, /*maxtags*/2
},
{
{ T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST36530*", "*"},
/*quirks*/0, /*mintags*/2, /*maxtags*/2
},
{
{ T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST39140*", "*"},
/*quirks*/0, /*mintags*/2, /*maxtags*/2
},
{
/* Broken tagged queuing drive */
{ T_DIRECT, SIP_MEDIA_REMOVABLE, "iomega", "jaz*", "*" },