There's some confusion about interleaving. There is no such thing as a 0
interleave, and most formatters will balk if you (try to) select it.
Here's what interleave means: When one sector is full of data, you need
to place the next bits somewhere. An interleave of 1:1 means that the
data goes to the physically adjacent sector (i.e., the next logical
sector is one physical sector away). An interleave of zero would mean
that the next sector is the same as the present sector. So, an
interleave of 1:1 (or just plain 1) is the minimum possible.

That said, an SE/30 handles 1:1 just fine. As others noted, the Plus,
with its brain-dead SCSI implementation, required a 3:1 interleave in
the old days. Modern drives have onboard buffers that cache an entire
track's worth of data (or more), making the physical interleave a
non-issue. Even a Plus will work with these newer drives at 1:1
interleave. Btw, this buffering is why the freeware "SCSI Accelerator"
(available at Jag's site and elsewhere) doesn't seem to do anything
these days. It's only effective when using older drives lacking a
buffer.

--
Prof. Thomas H. Lee
Center for Integrated Systems, CIS-205
420 Via Palou Mall
Stanford University
Stanford, CA 94305-4070
http://www-smirc.stanford.edu
650-725-3709 voice, -3383 fax



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