New thread. What exactly does "MB/second mean when referring to how much data can be copied from a DASD to a tape?
To be more precise, I am not interested in big MB vs. little mib, just the philosophy. Suppose I have a huge file on a "3390" virtual thing and I can copy whole tracks to tape at the rate of 100 MB/sec. Assume the tracks hold 50,000 bytes instead of 56,664 to make the math easier. Does 100 MB/sec. mean that I am copying 2,000 tracks per second? Maybe. What if there is nothing written on the tracks, but I don't know that until I read them in and then write the contents? Of course, there is always at least an R0 on every track, so they are not completely empty. If all they have written on them is R0, am I still transferring data at the rate of 100MB/sec? If each track were half full, would my effective data transfer rate be only 50 MB/sec? Bill Fairchild -----Original Message----- From: IBM Mainframe Discussion List [mailto:IBM-MAIN@bama.ua.edu] On Behalf Of Alan Altmark Sent: Monday, March 19, 2012 5:39 PM To: IBM-MAIN@bama.ua.edu Subject: Re: host codepge 0037 and the obscure "not sign" On Tue, 13 Mar 2012 12:51:26 -0400, Shmuel Metz (Seymour J.) <shmuel+ibm-m...@patriot.net> wrote: >>Is there any translation table in z/os 1.11 that translates the "NOT >>SIGN" x'5F' to an ascii x'AC', > >These is no ASCII 'AC'X; you really need to know what code pages you're >using to get a correct translation. If you use UCS-2, the NOT SIGN is U+00AC. But you're right, it isn't ASCII, it's Unicode. TYPE U 2 B (big endian Unicode) TYPE U 2 L (little endian Unicode) Also look at SITE UCSHOSTCS. Alan Altmark IBM ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: INFO IBM-MAIN
