The BDW / RDW length field for V files is a 4 byte length field with the first 2 bytes binary length.
On Thu, Jul 21, 2016 at 11:51 AM, Elardus Engelbrecht <[email protected]> wrote: > Reichman Joseph wrote: > >>The doc says bytes 0 - 3 is cylinders bytes 0 -3 is FFF00000 and bytes 4 - 7 >>000FF000 is tracks per cyl ? am I misreading misunderstanding the >>documentation > > What docs? Could you be kind to give us the URL of that source of above info > and docs? > >> I was looking for the capability on a dasd device >> DEVTYPE (R6),(AREA,L'AREA),INFOLIST=ILIST2 >> ILIST2 DEVTYPE INFO=DASD >> AREA DS XL16 > > Hmmm, interesting application of that useful macro. I must try out this > little gem next week on my z/OS v2.1 sandbox when I'm returning to my bread > and butter work... ;-) > >> This was the data returned in area R15 = 0 >> FFF00000 000FF000 00000100 08000000 > > On what z/OS level were you trying to try out that Assembler snippet? How did > you obtained the contents of that R15? Via a dump or a MVC or something else? > > >>Mike Schwab wrote: > >>> FFF00000 000FF000 00000100 08000000 >>x'FFF0' would be 65520 cylinders. x'000F' would be 15 tracks per cylinder. >>Reasonable for a 3390-54. > > Indeed. > > Groete / Greetings > Elardus Engelbrecht > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [email protected] with the message: INFO IBM-MAIN -- Mike A Schwab, Springfield IL USA Where do Forest Rangers go to get away from it all? ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
