________________________________ From: Rick Fochtman <rfocht...@ync.net> To: IBM-MAIN@bama.ua.edu Sent: Fri, May 13, 2011 3:32:34 PM Subject: Re: Copying tapes with 256K blocksizes
---------------------------------<unsnip>---------------------------------------- IIRC, IEHMOVE was a programming exercise for a IBM Assembler Language Programming class. While it is, in many ways, unmitigated junk, it does have the ability to copy more than one dataset in a single job step, without a boatload of DD staements. From what I remember, it uses OPEN TYPE-J to modify the DD statements supplied, with the possible exception of volume parameters, in a way similar to DYNALLOC processing today. The OP could probably also use REXX of CLIST exclusively to accomplish his end result, I just thought I'd "gag a few maggots" by suggesting IEHMOVE. :-) Rick ----------------------SNIP One of the key elements that one doesn't want to use it is that it is slooooooooooooow. Example (not current) we used to have a full pack PDS for source and at the time we had to us IEHMOVE to copy it to tape scratch it and reallocate it and restore it. AND YES I knew that IEBCOPY was faster but the storage it needed was more than we had. But even with a large storage it suffered unless you coded dcb=blksize= on the DD satement. Ed ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
