I have just received an IBM UltraStar ZX 18.2gb HD with a 80 to 50 pin adapter to allow its use on my old PowerMac 7600.
The problem is that the drive - even if it has been sold as "compatible" with my Mac - is not recognized in the SCSI chain.
The power is OK, the drive spins, but it is not recognized by the following software:
* Apple Drive Setup 1.9.2
* SCSI Probe 5.1.1
* FWB Hard Disk Toolkit 3.0.2
* Peripheral View 1.2.1
* Norton Utilities 5.0.3

I'm using it as an internal unit and I was thinking there was a jumper setting problem. The CS Electronics adapter supplied with the drive has 7 jumpers labelled as follows:
LED - SYN - DLY - RMT - ID3 - ID2 - ID1- ID0
I have tried every jumper combination, changing the ID0/ID1/ID2 from 0 to 6, along with all the others - with no success.

I didn't find any valuable info on IBM website nor CS Electronics'.

So, I'd really like to get any information on how to successfully use the drive on my 7600, as a useless 18gb HD would be a *very expensive* brick...

Thanks

Diego Meozzi

Is your SCSI chain properly terminated?

I'm using the drive as an internal unit, so it should be correctly terminated.
Anyway, looking into the IBM website http://www.storage.ibm.com/techsup/h...vs/drvsjum.htm I have found that my drive actually has *two* jumpers blocks: one is called SCA-2 and is in front of the unit, while the other is on the CS Electronics 80-50 pin SCA/Term adapter supplied with the drive.

I was thinking the rear 80 to 50-pin adapter would supersede the front jumpers.

Anyway, according to the manufacturer, to use this drive inside a Mac I should place jumpers in the front SCA-2 jumper block to:

• Select SCSI address (pins 0-8)
• Disable unit attention (pins 29-30)
• Disable target initiated sync negotiation (pins 25-26)

If necessary, they suggest to put other jumpers in order to:

• Disable wide negotiations (pins 31-32)
• Force single-ended mode (pins 23-24)

Well, after the placement of 5 jumpers in the front and 1 at the back, the situation is always the same: the drive isn't recognized at all.
The latest jumper configuration I have (unsuccessfully) tried is the following:

Rear 80-50 adapter

• jumper on ID1 (SCSI address no. 2)

Front SCA-2 jumper block:

• jumper on ID1 (SCSI address no.2)
• jumper on FORCE SE MODE (Force single-ended mode)
• jumper on DIS TI SY (Disable target initiated sync negotiation)
• jumper on DIS UN A (Disable unit attention)
• jumper on DIS F/W NEG (Disable wide negotiations)

This drive is driving me crazy...

Any additional info/suggestion would be greatly appreciated!

Thanks