666K cards at 80 bytes per is 53,333,280. A IBM 350 for a RAMAC 305 weighs over a ton and hold 5 million 6 bit characters 3.5MB. So you would need 15 of those. Or a PC hard disk drive from 1994 of 60MB. Or about 30 3.5 floppy disks. Or a small flash drive of 64M to 2G. Or a micro SD card of 2G.
On Tue, Dec 1, 2015 at 2:41 PM, Barry Merrill <[email protected]> wrote: > I think a box of 2000 IBM cards is on the order of 6 pounds, > so a TON of JCL cards would be 333 boxes, or about 666,666 > card images. > > But, the useful weight is zero, since we only use the holes. > > Barry > > > Herbert W. "Barry" Merrill, PhD > President-Programmer > MXG Software > Merrill Consultants > 10717 Cromwell Drive > Dallas, TX 75229-5112 > [email protected] > Fax: 214 350 3694 - Still works, received as email > Tel: 214 351 1966 - Unreliable, please use email > > www.mxg.com HomePage: FAQ answers most questions > [email protected] License Forms, Invoice, Payment, ftp information > [email protected] Technical Issues > MXG-L FREE ListServer http://www.mxg.com/mxg-l_listserver/ > > > > -----Original Message----- > From: IBM Mainframe Discussion List [mailto:[email protected]] On > Behalf Of Farley, Peter x23353 > Sent: Tuesday, December 01, 2015 1:59 PM > To: [email protected] > Subject: What's a "ton" of JCL? [was:RE: Straightforward way to determine > hardware architecture level?] > > Re: "ton" of JCL, at least one large shop of my prior acquaintance (20 or so > years ago) had over 250,000 members in the production applications JCL > libraries. > > Not sure how much of that was obsolete at the time, but the batch operations > control product they used had vast quantities of data as well. > > I think that counts as a "ton" or 2 . . . :) > > Peter > > -----Original Message----- > From: IBM Mainframe Discussion List [mailto:[email protected]] On > Behalf Of Peter Relson > Sent: Tuesday, December 01, 2015 9:30 AM > To: [email protected] > Subject: Re: Straightforward way to determine hardware architecture level? > > <Snipped> > > . . . migrating from Cobol 4 to Cobol 5 without changing a ton of JCL (how > much JCL is a "ton" anyway?). > > -- > > This message and any attachments are intended only for the use of the > addressee and may contain information that is privileged and confidential. > If the reader of the message is not the intended recipient or an authorized > representative of the intended recipient, you are hereby notified that any > dissemination of this communication is strictly prohibited. If you have > received this communication in error, please notify us immediately by e-mail > and delete the message and any attachments from your system. > > ---------------------------------------------------------------------- > 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
