In message <24599.884028041@dnaunix.pa.dec.com>, "Chris G. Demetriou" writes:
>> 
>> probe (ahc1:0.0): timed out in message out phase SCSISIGI == 0xb6
>> probe (ahc1:0.0): asserted ATN-device reset in message buffer
>
>What kind of devices are attached to that SCSI bus?  (In particular,
>what's at unit 0?)

>From his earlier message:

scsibus0 at ahc1
ahc1: target 0 synchronous at 10.0MHz, offset = 0xf
sd0 at scsibus0 targ 0 lun 0: <MICROP, 4421-07   0502SJ, 0502> SCSI2 0/direct fixed
sd0: 2047MB, 4049 cyl, 7 head, 147 sec, 512 bytes/sec
ahc1: target 1 synchronous at 3.6MHz, offset = 0xf
st0 at scsibus0 targ 1 lun 0: <ARCHIVE, Python 25501-XXX, 2.96> SCSI2 1/sequential removable
st0: drive empty
ahc1: target 2 synchronous at 10.0MHz, offset = 0x8
cd0 at scsibus0 targ 2 lun 0: <TOSHIBA, CD-ROM XM-5701TA, 0167> SCSI2 5/cdrom removable