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From: Don Bowman <don@sandvine.com>
To: "'Kenneth D. Merry'" <ken@kdm.org>, Don Bowman <don@sandvine.com>
Date: Sat, 9 Aug 2003 12:31:21 -0400 
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cc: "'freebsd-scsi@freebsd.org'" <freebsd-scsi@freebsd.org>
cc: "'aic7xxx@freebsd.org'" <aic7xxx@freebsd.org>
Subject: RE: Ongoing U320 AIC7902 Seagate ST318453LW issues, SCB timed out
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> From: Kenneth D. Merry [mailto:ken@kdm.org]
> On Fri, Aug 08, 2003 at 13:43:55 -0400, Don Bowman wrote:
> > Just to confirm i'm talking about the same thing...
> > my seagate device reports 255 tagged openings:
> > 
> > # camcontrol tags 0:0:0
> > (pass0:ahd0:0:0:0): device openings: 255
> > 
> > but seagate indicates the device has only support for
> > 64. Am i reading something different here?
> 
> You'll see 255 openings until we get a queue full response 
> from the drive.
> Then it'll go down to however many transactions we had 
> outstanding when the
> queue full happened.
> 
> If you want a little more information (e.g. how many transactions are
> outstanding at a given moment), try:
> 
> camcontrol tags da0 -v

Thanks for the info. This is what I see:

# camcontrol tags 0:0:0 -v
(pass0:ahd0:0:0:0): dev_openings  252
(pass0:ahd0:0:0:0): dev_active    3
(pass0:ahd0:0:0:0): devq_openings 252
(pass0:ahd0:0:0:0): devq_queued   0
(pass0:ahd0:0:0:0): held          0
(pass0:ahd0:0:0:0): mintags       2
(pass0:ahd0:0:0:0): maxtags       255
# camcontrol devlist
<SEAGATE ST318453LW 0005>          at scbus0 target 0 lun 0 (pass0,da0)