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Date:      Wed, 12 Aug 1998 10:55:22 -0600 (MDT)
From:      "Justin T. Gibbs" <gibbs@narnia.plutotech.com>
To:        "Andrew J. Doane" <adoane@ais.net>
Cc:        scsi@FreeBSD.ORG
Subject:   Re: Problems w/CAM (aha and bt issues)
Message-ID:  <199808121655.KAA09207@narnia.plutotech.com>
In-Reply-To: <199808121453.JAA00773@eagle.ais.net>

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In article <199808121453.JAA00773@eagle.ais.net> you wrote:
> Hello all,
> 
> I am currently running:
> 
> FreeBSD <hostname excluded> 3.0CAM-19980712-SNAP FreeBSD
> 3.0CAM-19980712-SNAP #1: Tue Aug 11 23:55:17 CDT 1998
> 
> I attempted to apply to 0716 patch but it appears it really was already
> installed with the 0712 snapshot-
> 
> cam_ccb.h:#define CAM_VERSION   0x4C    /* Hex value for current version
> */
> 
> is the same for both 0712 and 0716 (If this isn't a good way of
> determining this, please let me know).  The patch fails and wants
> to assume -R, so it really looks like it is already 0716.

The CAM_VERSION referes to the version of the CAM specification the
code is derived from.  I can't recal if I've already modified the value
or not, but FreeBSD doesn't exactly match any CAM specification, so we
shouldn't be using the standardized version number.

The 716 snapshot is different than the 712, but the patches are not
cumulative.  They are designed (as it states in the README file) to
be installed on top of a virgin -current or -stable.

> My problem with the 958D is:
> 
> da10 at bt1 bus 0 target 1 lun 0
> da10: <MICROP 3391WD\\000\\000\\000\\000\\000\\000\\000\\000\\000\\000
> P429> Fix
> ed Direct Access SCSI2 device 
> da10: 3.300MB/s transfers, Tagged Queueing Enabled
> da10: 8681MB (17780058 512 byte sectors: 255H 63S/T 1106C)

This is almost assuradly a reporting problem, not a problem with the
transfer rates in effect on the bus.  Can you send me the adapter 
information that FreeBSD prints out at boot?  Can you also check the
BIOS settings to ensure that they are at the max settings?

> The second issue is on ahc - I don't have specifics quite yet but I'm
> getting hangs on this disk which cause the entire system to hang.
> The next time it hangs I'll capture some console messages.  From
> memory is was something like "Timed out due to another timeout" and
> referenced aha:da1.  I had a similiar issue under linux and was forced
> to disable tagged queing on my microp 4743SS drives.  I'm not quite
> sure how to do that under fbsd.

Is this an SMP system?  There have been other reports of a similar
problem and I'm not convinced that it is drive related.

> da1 at ahc0 bus 0 target 2 lun 0
> da1: <MICROP 4743SS S162> Fixed Direct Access SCSI2 device 
> da1: 40.0MB/s transfers (20.0MHz, offset 8, 16bit)
> da1: 4100MB (8398656 512 byte sectors: 255H 63S/T 522C)

Tagged queuing isn't enabled on this drive, most likely because the
DQUE bit is set in the control mode page.

--
Justin

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