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non-Apple hard drive in a Mac II

pathw

6502
My apologies - this is a really old topic with tons of suggestions and tools available via a web search - almost too much - but I'm not having much luck and may just be missing something obvious.

I have a non-Apple ROM Quantum ProDrive LPS (100MB) that I would like to use in my Macintosh II. This is circa 1988, so only a year older than the II, and it works fine in newer systems (e.g. a PowerTower 180 running 7.5.3, 8.1 or 9.1). I've tried initializing with FWB (1.7.7), Silverlining (5.8.3), and Apple HD SC Setup 7.5.3 (patched), all on the PowerTower. It is never recognized on the Mac II, whether trying to boot from it or booting from a floppy (most recent System I've tried was 7.1) and looking for it.

I have a drive with an Apple ROM that works fine in the II, and I 've tried using the same SCSI id as the drive that works (0 in this case). The only jumpers that I can set (other than SCSI id) are SS, EP, and WS. EP (parity) is set, and the others are irrelevant (testing, and spin delay). There are no termination resistors.

Can anyone think of something that I haven't tried?

This isn't a requirement, but I'd like to use the ProDrive to "start from scratch", install 4.1 and move up. (I also have installation floppies for 5.0 and 6.0 and 7.1.) I'd rather not have to wipe the working drive. (Its larger, and it also has things that I prefer to leave on it at the moment.)

Thanks.

 
Or perhaps it is a termination issue. Something else to look at (if I can - no resistor packs, so need an external terminator plug?)

(kb/TA27743)

... The Macintosh has an internal hard drive
If the Macintosh in the SCSI chain DOES have an internal hard drive, terminate only the other end of the SCSI chain. (All Apple internal SCSI hard drives have built-in terminators).

... The Macintosh has a third party SCSI device
If you have a third-party (non-Apple) SCSI device, check the manual to find out if it is internally terminated. If the device is not internally terminated, follow the directions in the 2nd, 3rd, and 4th items directly above under the section "Terminating the SCSI Chain."

 
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Success - the working hard drive was also a Quantum ProDrive and it had fully populated resister packs, so I just moved them across. The other drive is now recognized (and booting the system).

 
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