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Limit the ST3146855LW U320 drive to 55 tags to avoid command timeouts

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under load.

Submitted by:	Gelson Borsoi
MFC after:	1 day
This commit is contained in:
Justin T. Gibbs 2012-02-15 07:30:23 +00:00
parent 8b8bfa3567
commit a470da8388
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=231745
1 changed files with 8 additions and 0 deletions
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8
sys/cam/scsi/scsi_xpt.c
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@ -293,6 +293,14 @@ static struct scsi_quirk_entry scsi_quirk_table[] =
{ T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST39140*", "*"},
/*quirks*/0, /*mintags*/2, /*maxtags*/2
},
{
/*
* Experiences command timeouts under load with a
* tag count higher than 55.
*/
{ T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST3146855LW", "*"},
/*quirks*/0, /*mintags*/2, /*maxtags*/55
},
{
/*
* Slow when tagged queueing is enabled. Write performance