Hi,

> Okay... Now I've opened the Mac and detached the harddrive
>
> its a IBM DCAS-32160
> so its not a Apple Harddrive, i know that e.g video cards have to provide OF
> Functionality in their BIOS
> is it the same with Harddisk...?
> If so it would explain why this HD does not work with OF.
> But why did it worked with MacOS 8.x? Because its booted partly of ROM?

No. Whether or not it has Apple formware on the drive doesn't matter at
all here.

> If not it could be a wrong jumper setting?I have the following possibilities
>
> 1. SPARE (50 BIT)
>    ID BIT 3 (FOR WIDE)
> 2. ID BIT 2
> 3. ID BIT 1
> 4. ID BIT 0
> 5. DISABLE AUTO SPIN
> 6. SCSI TERM ON
> 7. DISABLE UNIT ATTN
> 8. TI SYNC NEGO
> 9. AUTO START DELAY
> 10. DELAY START 6/12
> 11. DISABLE PARITY
> 12. LED OUT

> Any ideas? comments ...

You didn't say which of those pins had jumpers on them.

Did you try the drive on the external bus (the 50 pin connector on the
motherboard that is not marked "Fast SCSI")?

John Klos
Sixgirls Computing Labs