I think the possibility should be considered that the OP may have mistakenly been looking at the 16 bytes at AREA+2, not AREA. If that happened, and the missing bytes are hex 0000, the results would be correct for a device with 65520 cylinders.
Bill On Thu, 21 Jul 2016 14:30:41 -0500, Mike Schwab wrote: >> Volume Data >> Tracks . : 982,800 > >/ 15 = 65,520 = X'FFF0' > >On Thu, Jul 21, 2016 at 2:17 PM, Campbell Jay <[email protected]> wrote: >> Agree with John. >> Doc should say first halfword of bytes 0 - 3 & 4 - 7. >> >> MJI2 e . : IM404A >> Command ===> >> >> Unit . . : 3390 >> >> Volume Data VTOC Data Free Space Tracks >> Cyls >> Tracks . : 982,800 Tracks . : 360 Size . . : >> 269,730 17,974 >> %Used . : 72 %Used . . : 1 Largest . : >> 67,950 4,530 >> Trks/Cyls: 15 Free DSCBS: 17,892 Free >> >> Extents . : 36 >> >> Disclaimer: No idea what he's working on >> >> Jay Campbell >> IBM OS Support Section >> >> -----Original Message----- >> From: IBM Mainframe Discussion List [mailto:[email protected]] On >> Behalf Of Reichman Joseph >> Sent: Thursday, July 21, 2016 3:09 PM >> To: [email protected] >> Subject: Re: DEVTYPE INFO=DASD >> >> I just got word from Jay Campbell that the device capability is 17,974 cyls >> I am getting back X'FFF0' or 65,520, Since he is in touch with IBM I would >> suggest you contact him >> >> Thanks >> >> Joe Reichman >> Joe Reichman >> >> IT Specialist >> Master Files Division >> New Carrollton Federal Building, B7-182 >> OS:CTO:AD:CP:I:IB >> Flex M,T,Th,F >> Home office (240) 863 - 3965 >> Office (240) 613-4350 >> Cell (917) 748-9693 >> TOD M - F 7:30 am - 4:00 pm >> >> >> -----Original Message----- >> From: IBM Mainframe Discussion List [mailto:[email protected]] On >> Behalf Of John Eells >> Sent: Thursday, July 21, 2016 2:42 PM >> To: [email protected] >> Subject: Re: DEVTYPE INFO=DASD >> >> Well, yes, but we should get the book right. So do you mind telling me what >> the actual volume size is, just to confirm? >> >> Reichman Joseph wrote: >>> It is the first half word of each has to be >>> >>> Joe Reichman >>> Joe Reichman >>> >>> IT Specialist >>> Master Files Division >>> New Carrollton Federal Building, B7-182 OS:CTO:AD:CP:I:IB Flex >>> M,T,Th,F Home office (240) 863 - 3965 Office (240) 613-4350 >>> Cell (917) 748-9693 >>> TOD M - F 7:30 am - 4:00 pm >>> >>> >>> -----Original Message----- >>> From: IBM Mainframe Discussion List [mailto:[email protected]] >>> On Behalf Of John Eells >>> Sent: Thursday, July 21, 2016 2:35 PM >>> To: [email protected] >>> Subject: Re: DEVTYPE INFO=DASD >>> >>> I think I understand your confusion. I'm not sure why you're using the >>> z/OS V1.10 level of the book. But in any event, the current (V2.2) level >>> of the book says this returns, for INFO=DASD: >>> >>> Returns 16 bytes as follows: >>> Bytes 0-3 - Number of cylinders on the device, excluding alternates. >>> <snip> >>> >>> Bytes 4-7 - Number of tracks per cylinder. >>> >>> So one would reasonably expect x'FFF00000' to be the number of cylinders, >>> and x'000FF000' to be the number of tracks per cylinder. The values of the >>> first halfwords in each word, however, seem far more reasonable (possible, >>> even!). The correct number of tracks/cylinder is definitely 15. >>> >>> But what is the actual size of the volume? You can use "V" on ISPF >>> OPT3.4 to see VTOC information, including the volume size in tracks under >>> "Volume data" on the left. Divide by 15 to get cylinders. What do you see? >>> >>> It's likely RCF time... >>> >>> >>> Reichman Joseph wrote: >>>> 7.2.15 Marked DEVTYPE- info form from DFSMSdfp "Advanced Services" >>>> z/os V1R10.0 >>>> >>>> Joe Reichman >>>> Joe Reichman >>>> >>>> IT Specialist >>>> Master Files Division >>>> New Carrollton Federal Building, B7-182 OS:CTO:AD:CP:I:IB Flex >>>> M,T,Th,F Home office (240) 863 - 3965 Office (240) 613-4350 >>>> Cell (917) 748-9693 >>>> TOD M - F 7:30 am - 4:00 pm >>>> >>>> >>>> -----Original Message----- >>>> From: IBM Mainframe Discussion List [mailto:[email protected]] >>>> On Behalf Of Elardus Engelbrecht >>>> Sent: Thursday, July 21, 2016 12:52 PM >>>> To: [email protected] >>>> Subject: Re: DEVTYPE INFO=DASD >>>> >>>> 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. >>>> >>> <snip> >>> >>> >>> -- >>> John Eells >>> IBM Poughkeepsie >>> [email protected] >>> >>> ---------------------------------------------------------------------- >>> For IBM-MAIN subscribe / signoff / archive access instructions, send >>> email to [email protected] with the message: INFO IBM-MAIN >>> >>> ---------------------------------------------------------------------- >>> For IBM-MAIN subscribe / signoff / archive access instructions, send >>> email to [email protected] with the message: INFO IBM-MAIN >>> >> >> >> -- >> John Eells >> IBM Poughkeepsie >> [email protected] >> >> ---------------------------------------------------------------------- >> For IBM-MAIN subscribe / signoff / archive access instructions, send email >> to [email protected] with the message: INFO IBM-MAIN >> >> ---------------------------------------------------------------------- >> For IBM-MAIN subscribe / signoff / archive access instructions, >> send email to [email protected] with the message: INFO IBM-MAIN >> >> ---------------------------------------------------------------------- >> 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 ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
