Page 9. For this design of storage device, one extent is 1113 cylinders. A volume consists of one or more extents. Another extent can be added to an existing volume, then run ICKDSF to utilize the additional space.
EAVs go to 256K (or so) tracks and now 1024K (or so) cylinders. Design limit of 4K * 64K (256M) cylinders. Beyond the 64K cylinder limit, data sets are allocated in multiples of 21 cylinders (53 extents per 1113 cylinders). IBM ESS F20 / 800s allowed defining by cylinder count up to 32K (32760) then 64K, but no extensions. On Wed, Nov 18, 2015 at 11:19 AM, J O Skip Robinson <[email protected]> wrote: > Since IBM does define any model larger than a Mod-9, usage of other Mod-xx > terms is user defined. I would think, however, that the historical derivation > of model terminology is based on capacity relative to a (mythical?) Mod-1. In > any case, a Mod-9 is 3x the size of a Mod-3, so I would expect a Mod-27 to be > 3x a Mod-9. Similar consideration for a Mod-54. (Have not heard discussion of > anything larger.) > > . > . > . > J.O.Skip Robinson > Southern California Edison Company > Electric Dragon Team Paddler > SHARE MVS Program Co-Manager > 626-302-7535 Office > 323-715-0595 Mobile > [email protected] > > -----Original Message----- > From: IBM Mainframe Discussion List [mailto:[email protected]] On > Behalf Of Jasi Grewal > Sent: Wednesday, November 18, 2015 9:00 AM > To: [email protected] > Subject: (External):Is there an Standard Size for 3390-27's? > > Greetings, I would like to know, if there are any standard sizes for > 3390-27's because I read different manuals and each of them refers as either > 30015 Cyl or 32760Cyl for Mod 27's. > > Would like to hear your setup of Mod 27's and if you are using 30015 or 32760 > Cyl for Mod 27's. > Here's the two manuals that states two different settings for mod 27's: > > http://www.scribd.com/doc/51615339/IBM-Mainframe-Disk-Capacity-Table#scribd > http://www.redbooks.ibm.com/redpapers/pdfs/redp4187.pdf > > Model Cylinders Tracks Bytes/volume Bytes/track > 3390-1 1113 16695 946 MB 56664 > 3390-2 2226 33390 1.89 GB 56664 > 3390-3 3339 50085 2.83 GB 56664 > 3390-9 10017 150255 8.51 GB 56664 > 3390-27 32760 491400 27.84 GB 56664 > 3390-54 65520 982800 55.68 GB 56664 > > Then this manual states 30015 Cylinders: > http://www-01.ibm.com/support/docview.wss?uid=tss1prs4558&aid=1 > > Thanks in advance, > Regards, > > Jasi Grewal. > > > ---------------------------------------------------------------------- > 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
