[3758] in linux-scsi channel archive
Python drive SCSI errors
daemon@ATHENA.MIT.EDU (Raymond A. Ingles)
Fri Apr 24 10:53:33 1998
Date: Fri, 24 Apr 1998 09:22:20 -0400 (EDT)
From: " Raymond A. Ingles" <inglesra@frc.com>
To: linux-scsi@vger.rutgers.edu
A week ago I asked for info about the format & specs of a Python drive,
and y'all were very helpful. Now I've got another, somewhat more difficult
problem.
The drive is recognized fine on bootup, but I can't do anything with it.
Any operation I attempt on it gives me an "I/O Error". I enabled debugging
in st.c and recompiled the kernel, with the following results:
-------------------------
# mt -f /dev/st0 rewind
st0: Error: 28000002, cmd: 0 0 0 0 0 0 Len: 0
extra data not valid Current error st09:00: sense key Not Ready
Additional sense indicates Medium not present
mt: /dev/st0: I/O error
-------------------------
It's attached to an NCR 53c825 (using the ncr53c8xx driver), on the
internal 50-pin connector. It's the only item on the internal bus, the
other two items are external. The SyQuest drive and the scanner work
perfectly. This tape drive is the first thing I've put on the internal
bus, though, so I can't be 100% sure it's working, but I've no reason so
far to think it's broken.
I've tried:
- Compiling st.c as a module and as part of the kernel
- Every possible position of the termination jumpers
- Confirming the 50-pin cable is attached correctly.
Here are the relevant boot messages from dmesg:
--------------------------
ncr53c8xx: at PCI bus 0, device 11, function 0
ncr53c8xx: 53c825 detected
ncr53c825-0: rev=0x02, base=0xfbfdf000, io_port=0xe800, irq=12
ncr53c825-0: ID 7, Fast-10, Parity Checking
ncr53c825-0: restart (scsi reset).
scsi0 : ncr53c8xx - revision 2.4a
scsi : 1 host.
Vendor: ARCHIVE Model: Python 25501-XXX Rev: 2.96
Type: Sequential-Access ANSI SCSI revision: 02
Detected scsi tape st0 at scsi0, channel 0, id 3, lun 0
Vendor: SyQuest Model: EZ230S Rev: 6722
Type: Direct-Access ANSI SCSI revision: 02
Detected scsi removable disk sda at scsi0, channel 0, id 4, lun 0
Vendor: SCANNER Model: Rev: 2.01
Type: Scanner ANSI SCSI revision: 01 CCS
Detected scsi generic sgc at scsi0, channel 0, id 6, lun 0
scsi : detected 1 SCSI tape 1 SCSI disk total.
st: Buffer size 32768 bytes, write threshold 30720 bytes.
st: Allocated tape buffer 0 (32768 bytes, dma: 1, a: 00270000).
st: Allocated tape buffer 1 (32768 bytes, dma: 1, a: 00088000).
ncr53c825-0-<4,0>: SLOW SCSI 5.0 MB/s (200 ns, offset 8)
SCSI device sda: hdwr sector= 512 bytes. Sectors= 450560 [220 MB] [0.2 GB]
sda: Write Protect is off
ncr53c825-0-<3,0>: SLOW SCSI 3.3 MB/s (300 ns, offset 8)
--------------------------
Any suggestions, words of encouragement, fond thoughts? Thanks!
Sincerely,
Ray Ingles (248) 377-7735 ray.ingles@fanucrobotics.com
"Monkeys would be harder on equipment than college students,
but only because they're stronger." - Jim Ingles
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