🚀 go-pugleaf

Rick_Michael_Cortese@cup.portal.com wrote:
: $.02, Double check to see if your BIOS supports automatic interleave. AMI on
: my clone does. There's also so PD stuff running around BBS's that'll tell you
: your I/O speed. For instance, I just recently formated an old RLL drive on my
: back-up computer. Reccommended setting was '5, but '7 produced the best
: performance (Hey! it's an ancient computer & drive). Went 5 times as fast
: using 7 vs 6.

This makes sense. The proper interleave for your system depends on your
controller, and how fast the CPU can read the data. If the interleave is too
low, then the CPU or controller is not ready to receive the data, and the
platter must make another full rotation (equivalent to an interleave of 17
on MFM, higher on RLL) before it can read the next sector of data. The correct
interleave is where the next nth sector passes under the disk heads at the
time the controller and CPU is ready to read it. On fast systems with good
controllers, 1:1 is possible. On most AT class machines (286) 2 or 3:1 is
typical. On old PC/XT systems, 6 or 7:1 is typical.

Russ Poffenberger               DOMAIN: poffen@sj.ate.slb.com
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