J.Purchase@cs.ucl.ac.uk (Jan Purchase) (01/14/91)
Hello,
I run A/UX 2.0 from an external Quantum 120Mb hard disk and I am
encountering SCSI timeouts (about 6 per day) from this drive. Can anyone out
there give me a clue as to *why* this is happening?
My / and /usr partitions are on the external, which has SCSI id 4; the
internal houses the /users partition. Every now and then the Mac (a 5Mb
IIcx) freezes for 10 seconds during which the external drive's access light
is on for 5 seconds and then off for the next 5. Finally an error message:
Disk write c4d0s0 Error: SCSI timeout
Logical block 808, physical blocks 78038-78045
Disk write c4d0s0 retry #2 successful
appears at the console and processing continues as normal. The drive number
varies (often it is c4d0s2, i.e. /usr; or c4d0s1, i.e. swap), as do the
logical and physical block numbers. However, the retry count is always 2 and
the problem is always a write error. The error does not perturb A/UX (apart
from the delay), but under the Finder some Mac applications quit immediately
on receipt of the error.
The same drive has been used under MacOS for some 4 months previously with
no ill effects or errors. A thorough going over with SCSI Evaluator reveals
no fault - has anyone else encountered this problem? Any ideas?
Grateful for any help,
Jan.
****************************************************************************
FROM : Jan Andrew Purchase | Snail: Room 208, PhD Lab.,
| Computer Science Dept.,
JANET : J.Purchase@uk.ac.ucl.cs | University College,
ARPANET : J.Purchase@cs.ucl.ac.uk | London, UK.
UUCP : {... ukc!}ucl.cs!purchase |
****************************************************************************
(these are my views, and are not necessarily those of UCL)
****************************************************************************damour@sol.ral.rpi.edu (Kevin Damour) (01/15/91)
In article <1361@ucl-cs.uucp> J.Purchase@cs.ucl.ac.uk (Jan Purchase) writes:
Hello,
I run A/UX 2.0 from an external Quantum 120Mb hard disk and I am
encountering SCSI timeouts (about 6 per day) from this drive. Can anyone out
there give me a clue as to *why* this is happening?
My / and /usr partitions are on the external, which has SCSI id 4; the
internal houses the /users partition. Every now and then the Mac (a 5Mb
IIcx) freezes for 10 seconds during which the external drive's access light
is on for 5 seconds and then off for the next 5. Finally an error message:
Disk write c4d0s0 Error: SCSI timeout
Logical block 808, physical blocks 78038-78045
Disk write c4d0s0 retry #2 successful
appears at the console and processing continues as normal. The drive number
varies (often it is c4d0s2, i.e. /usr; or c4d0s1, i.e. swap), as do the
logical and physical block numbers. However, the retry count is always 2 and
the problem is always a write error. The error does not perturb A/UX (apart
from the delay), but under the Finder some Mac applications quit immediately
on receipt of the error.
The same drive has been used under MacOS for some 4 months previously with
no ill effects or errors. A thorough going over with SCSI Evaluator reveals
no fault - has anyone else encountered this problem? Any ideas?
Grateful for any help,
Jan.
I had a similar problem with lots of timeouts on my newly purchased
Quantum 170Mbyte drive. It worked great under MAC OS but installation
of AUX with a CD-ROM produced many SCSI error messages. The company
from whom I purchased it helped me track down the problem to the
revision on the ROM!! I had a revision in the 40's and the latest
release was in the 50's. Once I had the new ROMs installation went
perfect.
Hope this helps,
Kevin Damour
RPI NASA-CIRSSE
damour@ral.rpi.eduwgstuken@informatik.uni-erlangen.de (Wolfgang Stukenbrock (Dipl. Zugangssystem Inf4)) (01/15/91)
J.Purchase@cs.ucl.ac.uk (Jan Purchase) writes:
The problem may be a termination problem of the SCSI-bus.
Under AUX much more traffic comes over SCSI and so the wrong
termination may not bite under MacOS.
Wolfgang