As far as I know, your assumption about the naming of the "-27" is incorrect. The "-3" and "-9" DASD volumes actually existed as physical 3390 formats. An emulated "-27" is 3 times the capacity of a "-9" (just like the "-9" was 3 times the capacity of a "-3").
David Mueller | Consultant | DMS/EITS - BearingPoint Phone: 850-414-9134 (Rm 107 SRC) | Fax: 850-921-8343 E-mail: [EMAIL PROTECTED] -----Original Message----- From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On Behalf Of Chris Mason Sent: Friday, December 09, 2005 11:30 AM To: [email protected] Subject: Re: 3390-81 John, Assuming you are puzzling over the supposed model numbers, applying some wild and unfounded speculation, we may suppose that "27" was selected for the 2nd and 3rd numbers in the number of cylinders number - now I have to say "Why they chose this algorithm I do not know.". One may now suppose that the "54" was just double "27". <snip> Chris Mason ---------------------------------------------------------------------- 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
