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Date:      Tue, 14 May 1996 20:01:21 +0000 ()
From:      Pedro A M Vazquez <vazquez@IQM.Unicamp.BR>
To:        questions@freebsd.org
Subject:   CD problems
Message-ID:  <199605142001.UAA01815@kalypso.iqm.unicamp.br>

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Hello
	I'm experiencing problems with a SCSI CD rom, sometimes
if I try to read a large (1M or more) file the system reports:

May 13 18:15:10 fenixeth /kernel: ahb0:6:0 (cd0) timed out
May 13 18:15:20 fenixeth /kernel: cd0(ahb0:6:0): ABORTED COMMAND asc:4e,0 Overla
pped commands attempted
May 13 18:15:20 fenixeth /kernel: vm_fault: pager input (probably hardware) erro
r, PID 27800 failure
May 13 18:16:07 fenixeth /kernel: ahb0:6:0 (cd0) timed out
May 13 18:16:07 fenixeth /kernel: pid 27811: more: uid 0: exited on signal 3
May 13 18:16:58 fenixeth /kernel: ahb0:6:0 (cd0) timed out
May 13 18:16:58 fenixeth /kernel: ahb0: Unexpected ASN interrupt(0x22)
May 13 18:16:58 fenixeth /kernel: sd0(ahb0:0:0): UNIT ATTENTION asc:29,0 
May 13 18:16:58 fenixeth /kernel: sd0(ahb0:0:0):  Power on, reset, or bus device
 reset occurred
May 13 18:16:58 fenixeth /kernel: , retries:4
May 13 18:17:49 fenixeth /kernel: sd1(ahb0:1:0): UNIT ATTENTION asc:29,0
May 13 18:17:49 fenixeth /kernel: sd1(ahb0:1:0):  Power on, reset, or bus device
 reset occurred 
May 13 18:17:49 fenixeth /kernel: , retries:4

and the systems panics due the sd0 errors.

This is a 486DX 33 with 16M RAM and an Adaptec 1742 EISA controler running 
2.1.0-R the CD is an external Sun (Sony) we used in the past with Sparc 
machines.

May 14 12:39:29 fenixeth /kernel: (ahb0:6:0): "SONY CD-ROM CDU-8012 3.1e" type 5
 removable SCSI 2
May 14 12:39:29 fenixeth /kernel: cd0(ahb0:6:0): CD-ROM cd present.[1301008 x 51
2 byte records]
one:

what bothers me it worked fine in the past with 2.0.5 and 2.1.0. We have used
it for serving data bases without problems, then it was unused for the
last 3 months. I double checked cables, termination, etc and all seems Ok.
Do I have a hardware problem here (this systems stays up forever if I'm not
using the CD) ?

Pedro




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