Actually x'00' disconnects until position is just before index point so
the following search Id starts with
index point count at 1, maximum scan for the Id will be one revolution
till next time index point is detected.
Using x'FF' will not disconnect and search id starts at current
position which could be just after index point
so maximum rotation could be almost two revolutions till index
point is detected twice.
(IBM Mainframe Discussion List) wrote:
In a message dated 7/24/2007 1:12:43 P.M. Central Daylight Time,
[EMAIL PROTECTED] writes:
Using a sector number of x'00' effectively disabled RPS on devices that
did care.
Not true. It forces the controller to position the track at index point,
the very beginning of the track. A sector value of X'FF' is the only value
that causes the controller to bypass setting an angular position. Of course,
this could also be bypassed by not having a set sector command or a locate
record command with a sector value of X'FF', but then you defeat the original
intended purpose of RPS.
Bill Fairchild
Plainfield, IL
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