Apple Mac 8600 - Manual (Page 82)

Troubleshooting Symptom Charts/Hard Drive - 19
4 If drive is not initialized, use Drive Setup to initialize.
5 Replace with known-good hard drive.
6 If hard drive still doesn't work, switch back to original hard
drive and replace logic board.
Works with internal
or external SCSI
devices but not with
both
1 Verify there are no duplicate SCSI device addresses on a
single SCSI bus. (Refer to Basics chapter for detailed
explanation of SCSI IDs used in WS 9650.)
2 Replace terminator on external SCSI device.
3 Verify that SCSI device at end of internal SCSI data cable is
only device terminated. In PM 8600 or 9600, last connector
on Fast SCSI-2 cable attaches to rear internal hard drive,
which is terminated. In WS 9650, Fast SCSI-2 cable should
have terminator on last connector or last connector should be
attached to terminated hard drive. On Ultra Wide SCSI-3 bus
in WS 9650, internal rear drive is terminated and SCSI PCI
card is auto-terminated. No other devices on the bus should
be terminated. (Refer to Basics chapter for detailed