I am testing a PB 170 which has a bad hard disk drive. I connected the HD-30 SCSI dock adapter to it, but at startup it won't enter SCSI disk mode, instead it just stays at the blinking insert disk icon.

I tried the same cable setup with the PB 160 and 170, and they both work flawlessly. Is the PB 170 too old to support this SCSI disk mode or is something else wrong?

I am connecting it to the Power Mac G3 Beige.

Any ideas?