IBM Mainframe Discussion List <IBM-MAIN@BAMA.UA.EDU> wrote on 03/02/2007 04:35:23 PM:
> The limit for CKD volumes is a little more than 54GB. I come up with a > number closer to 500GB. Past that and IBM will need to go to logical > volumes on a physical volume. The reason is the CCHHR count field. > > Max CC is FFFF, which give 65536 cylinders (don't forget cylinder 0) > Max HH is E, which gives 15 tracks per cylinder > > That gives: > 65536 cylinders times 15 tracks times 56664 bytes = 983040 tracks * > 56664 > 983040 tracks * 56664 = 557,053,378,560 Hmmm. My calculator says 983040*56664=55,702,978,560. Mark Wheeler, 3M Company ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
