------------------------------------<snip>---------------------------
Edward Jaffe wrote:
Rick Fochtman wrote:
---------------------------------<snip>-------------------------------
It sounds as if they're concerned about the application or operating
system "math" required to convert an "emulated FBA sector number" to
CCCCcccHR. You have to divide by some RPT (records per track) value
to get track and record number. Then divide track by 15 to get
cylinder, track, and record.
------------------------------<unsnip>----------------------------
Why not just use BDAM and Relative Record addressing? As far as I
know, that still works and it's pretty fast, too. :-)
That is a case in point. BDAM routines must convert the relative
record number managed at the application level to CCCCcccHR for the
channel programs it builds and convert the other way if it reads count
fields, etc. I suspect the overhead to do this conversion is
insignificant.
---------------------------<unsnip>-------------------------------
In my experience, that's entirely true. Plus, I don't have to try and
figure out which extent it's going to refer to.
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