Re: Jaz Drive

[nparker@cie-2.uoregon.edu (Neil Parker)]

In article <5f18kb$g88@sun.rhrk.uni-kl.de> guenter@student.uni-kl.de
(Marvin) writes:
>[...]
>You need two things to use a Jaz on a gs:
>
>1) A RamFast SCSI card. Older SCSI's may work, but only Sequential's
>RamFast supports the new SCSI-2 standard. Problems with Apple High-speed
>SCSI cards and zip drives have been reported, there will probably be
>problems with the jaz, too.

I don't own a RamFast, but everything I've ever read about it online would
seem to indicate that this is *not* true...the RamFast seems to be a
thoroughly SCSI-1 device.

But in practice, this isn't much of a limitation.  There are a few SCSI
devices that can't cope with the RamFast's SCSI-1 behavior, but most get
along just fine with it.  (The problem devices seem to be SCSI-2 devices
that don't support the old "single initiator" and "select without ATN"
options from SCSI-1.)

I've heard of plenty of problems between Apple SCSI cards and various
devices, but they almost always turn out to be bad termination, or running
with DMA enabled and a non-DMA-compatible RAM card, or having two devices
with the same SCSI ID, or some other transient cause (where "transient" is
defined as "correctable without replacing the device or interface card").
I've *never* heard of any SCSI-1 vs. SCSI-2 conflicts involving an Apple SCSI
card.

               - Neil Parker
-- 
Neil Parker, nparker@{cie-2,cie}.uoregon.edu, http://cie-2.uoregon.edu/~nparker
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