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Date:      Sun, 23 May 1999 06:15:15 -0700 (PDT)
From:      Donald Burr <dburr@pobox.com>
To:        FreeBSD Questions <freebsd-questions@freebsd.org>
Cc:        FreeBSD SCSI <freebsd-scsi@freebsd.org>
Subject:   Help! - "parity error during data-in phase" when using CD-R drv
Message-ID:  <Pine.BSF.4.10.9905230602020.703-100000@control.colossus.dynip.com>

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I have suddenly started getting the following types of error messages when
trying to access a CD-ROM that's mounted in my SCSI CD-R (CD-recordiable,
cd writer) device.

May 23 03:01:51 control /kernel: (cd0:ahc0:0:4:0): parity error during Data-In phase.
May 23 03:01:51 control /kernel: SEQADDR == 0x110
May 23 03:01:52 control /kernel: SCSIRATE == 0xf
May 23 03:02:34 control /kernel: (cd0:ahc0:0:4:0): SCB 0x31 - timed out in datain phase, SEQADDR == 0x153
May 23 03:02:34 control /kernel: (cd0:ahc0:0:4:0): BDR message in message buffer
May 23 03:02:34 control /kernel: (cd0:ahc0:0:4:0): SCB 0x31 - timed out in datain phase, SEQADDR == 0x153
May 23 03:02:35 control /kernel: (cd0:ahc0:0:4:0): no longer in timeout, status = 34b
May 23 03:02:35 control /kernel: ahc0: Issued Channel A Bus Reset. 120 SCBs aborted
May 23 03:02:35 control /kernel: (cd0:ahc0:0:4:0): parity error during Data-In phase.
May 23 03:02:35 control /kernel: SEQADDR == 0x110
May 23 03:02:35 control /kernel: SCSIRATE == 0xf
[...]

Please note that ALL OF MY OTHER SCSI PERIPHERALS ARE WORKING FINE.

Before I continue, let me mention my system's configuration.

EPoX EP-MVP3G Motherboard (VIA MVP3 chipset)
	AMD K6-2/300 CPU (100 bus * 3 multiplier)
	128 MB PC100 SDRAM DIMM
NO IDE HARD DRIVES
IDE CD-ROM: Creative Labs PC-DVD Encore Dxr2 (Primary master)
SCSI: Adaptec AHA-2940AU PCI SCSI controller
	SCSI disk 0: Quantum Viking 4.5 GB
	SCSI disk 1: Quantum Viking 4.5 GB
	SCSI disk 2: IBM 0662 S12 1.0 GB
	SCSI CD-ROM 4: Sony CDU-926S CD-Recordable (CD-R) drive
	SCSI Scanner 5: UMAX Astra 1200S
	SCSI DAT drive 6: Wangtek 6200-HS
	(Yes, the bus is properly terminated and all that, I checked.)
OS: FreeBSD 3.1-RELEASE

Anyway, as I said, my other SCSI devices (hard drives, scanner, etc.) are
working fine.  The ATAPI DVD-ROM drive is also working fine.  It's only
the SCSI CD-recorder that does not work.  It fails when accessing mounted
CD's (doing a 'du' of the CD will bring the error on really quickly), and
also I cannot use tosha to grab audio tracks off of it (same error).  I
don't dare trying to write a CD on it...

The drive does not work under Windows either.

Here's something interesting: This same hardware configuration (except the
motherboard) was, up until a few weeks ago, installed in an AT case with a
Tyan Titan Turbo S1571 motherboard, and it worked fine (CD burner and
all).  However in mid-April I got myself a new ATX motherboard (the EPoX
one) and case, and I moved all of my hardware into that.  I don't really
use the CD-burner that often, so it was only just yesterday (when I wanted
to grab some audio tracks from a music CD to burn a "greatest
hits" type cd), that I noticed the errors.

It seems to me, then, that I somehow managed to damage the drive while
moving it between cases.  But I thought I had better post this anyway, in
case someone else out there has any ideas as to what I'm doing wrong, or
how I might go about fixing this.

Thanks in advance for whatever help you may be able to provide.
-- 
Donald Burr <dburr@pobox.com>                           | PGP: Your
*NEW* WWW HomePage: http://more.at/dburr/ ICQ #16997506 | right to
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Phone: (805) 957-9666    FAX: (800) 492-5954            | USE IT.



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