We're having ongoing 'discussions' with our tape vendor over through-put performance. Vendor is suggesting that we should be using modern man-size blocks like 256K. I did some simple testing yesterday to satisfy myself that--whatever it might take to super-size our tape file blocks--simply adding
BLKSIZE=some-large-number to a DD card will not cause the creation of very large blocks. After running such a job with an existing RYO program, the resulting BLKSIZE was in fact 32K. No error messages, just no big blocks. Am I right in asserting that, whatever benefit we might derive from uber-blocks, we cannot get there by fiddling with JCL? . . JO.Skip Robinson Southern California Edison Company Electric Dragon Team Paddler SHARE MVS Program Co-Manager 626-302-7535 Office 323-715-0595 Mobile jo.skip.robin...@sce.com ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
