Re: rotational position sensing (RPS)

2007-07-24 Thread Edward Jaffe
(IBM Mainframe Discussion List) wrote: Careful reading of the 2105 Command Reference doc shows that valid sector numbers are not documented as being ignored. I take that to mean they are used as documented; i.e., the next action on the track will commence with track orientation at a predict

Re: rotational position sensing (RPS)

2007-07-24 Thread (IBM Mainframe Discussion List)
Careful reading of the 2105 Command Reference doc shows that valid sector numbers are not documented as being ignored. I take that to mean they are used as documented; i.e., the next action on the track will commence with track orientation at a predictable position on the track. If the nex

Re: rotational position sensing (RPS)

2007-07-23 Thread john gilmore
Bill Fairchild writes: The ones that are not ignored are the ones that are invalid; i.e., higher than the highest allowable number but also not equal to X'FF'. If your channel program has an invalid sector number, the ESS will fail your channel program with unit check - invalid parameter. I