Last time I explored this issue, the problem went beyond 'help'. In many cases of 'product allocated' files, existing output blocksize was overridden by 3120 regardless of how it was set ahead of time. I really don't think that BLKSIZE=0 will cause a problem. You just may not get what you bargained for.
. . 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 From: Charles Mills <charl...@mcn.org> To: IBM-MAIN@LISTSERV.UA.EDU, Date: 07/22/2013 09:28 AM Subject: Re: BLKSIZE=3120 Sent by: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> I took the giant leap several years ago and stopped using 3120 for TSO XMIT. I hard-code 27920. Not as wonderful as 0, but better than 3120. Several years now with no issues. Charles -----Original Message----- From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf Of Ed Jaffe Sent: Monday, July 22, 2013 9:08 AM To: IBM-MAIN@LISTSERV.UA.EDU Subject: BLKSIZE=3120 A customer (mildly) complained thatsome of our product allocations still use BLKSIZE=3120. I vaguely remember trying to change all of them to BLKSIZE=0 many years ago (probably before OS/390) and running into some issues with certain IBM utilities. Unfortunately, I can't remember the specifics. In starting to revisit this again, I noticed numerousoccurrences of '3120' in IBM help and documentation. For example, the TSO/E RECEIVE command HELP claims that the log data set must be BLKSIZE=3120: <TSO/E RECEIVE command HELP> LOGDATASET You may specify an alternate data set to be used for the logging of the transmitted data. This data set will be created if it does not exist. The data set should be created with a logical record length of 255, a record format of VB and a blocksize of 3120. ... LOGDSNAME You may specify an alternate data set to be used for the logging of the transmitted data. This data set will be created if it does not exist. The data set should be created with a logical record length of 255, a record format of VB and a blocksize of 3120. </TSO/E RECEIVE command HELP> Is this just outdated help? Or does this restriction still exist? ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
