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:IBM-MAIN@listserv.ua.edu] On Behalf Of Reichman Joseph Sent: Thursday, July 21, 2016 3:09 PM To: IBM-MAIN@listserv.ua.edu 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:IBM-MAIN@listserv.ua.edu] On Behalf Of John Eells Sent: Thursday, July 21, 2016 2:42 PM To: IBM-MAIN@listserv.ua.edu 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:IBM-MAIN@listserv.ua.edu] > On Behalf Of John Eells > Sent: Thursday, July 21, 2016 2:35 PM > To: IBM-MAIN@listserv.ua.edu > 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:IBM-MAIN@listserv.ua.edu] >> On Behalf Of Elardus Engelbrecht >> Sent: Thursday, July 21, 2016 12:52 PM >> To: IBM-MAIN@listserv.ua.edu >> 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 > ee...@us.ibm.com > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, send > email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, send > email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN > -- John Eells IBM Poughkeepsie ee...@us.ibm.com ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN