In a message dated 11/25/02 7:54:56 PM, [EMAIL PROTECTED] writes:
<<
I thought I read somewhere in the G3 docs that Apple recommends using a
single channel card? Myth?
>>
A dual-channel SCSI card, such as the Apple/ATTO UL2D works in some cases;
fails in others.
As a "pathological case", I setup a UL2D in a Beige G3, which already had a
bootable UATA/100 drive as EIDE Bus 0 Master, and a bootable N-SCSI drive as
SCSI Bus 0 ID 0. The machine got a Type ? Error [ * ] dialog and hung under
the described configuration.
With only the two UW-SCSI drives attached (the EIDE Bus 0 hard drive and the
SCSI Bus 0 ID 0 drive were detached), the UL2D worked fine.
With dual-channel cards, such as the UL2D, which hide more than one logical
controller behind a PCI "bridge" function, you have to be very careful (the
same problem appears to exist with the Sonnet "Trio" card, which hides THREE
controllers).
I have yet to figure out a completely foolproof method us using more than one
of the channels of these UL2D cards.
* I state "?" as the error code as the machine would hang after displaying
the dialog box, but before displaying the error message itself and any option
button ("RESTART", or otherwise).
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