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Date:      Sat, 28 Mar 1998 23:04:19 -0600
From:      John Mastrolia <jmastrol@mcs.net>
To:        freebsd-hardware@FreeBSD.ORG
Subject:   SCSI card difficulties
Message-ID:  <19980328230419.24086@mcs.net>

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I am getting a few error messages with my Symbios 53C860 based SCSI
card that seem a bit unusual.  First, I'm running FreeBSD 2.2.5-RELEASE
on an asus P55T2P4 3.10 motherboard with an AMD K6-233.  Devices include
two Seagate ST31200N's, a DEC RZ26L, an External Zip (SCSI), a
Plextor 12/20-PLEX cd-rom, and (the problem) an Exabyte 4200-c DAT
tape drive.

With the ncr 860 card the tape drive works as expected faithfully completing
backups.  The errors only occur on start up.  Here's a snippit of dmesg:

--- begin ---
(ncr0:4:0): "EXABYTE EXB-4200c 149" type 1 removable SCSI 2
st0(ncr0:4:0): Sequential-Access ncr0: SCSI phase error fixup: CCB address misma
tch (0xf0852400 != 0xf06a6400) np->ccb = 0xf06a6400

st0(ncr0:4:0): phase change 6-7 6@004bf5d8 resid=4.

st0(ncr0:4:0): asynchronous.

st0(ncr0:4:0): M_REJECT received (4:8).
density code 0x13,  drive empty
--- end ---

The device is setup to 5MB/sec with queue tags disabled, 8 bit width 
in the 860's setup.

The machine is running flawlessly and I did not notice any problems until
I made the mistake of upgrading the SCSI card to an NCR 53C875.  The 
darn system would not boot until the tape was removed from the chain.
I have the error messages if anyone is interested, but thought I would
address these oddities with my narrow card before jumping further into
the fire.

Any suggestions or info appreciated.
Thanks in advance.
-- 
jmastrol@mcs.net


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