Obviously memory didn't serve. The TMBLKSI field in the CA-1 TMC is indeed 4 bytes. But the manual says the data comes from the JFCBLKSI field in the JFCB and that field is only 2 bytes. I wonder where CA-1 picks up the extra data from.
> -----Original Message----- > From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] > On Behalf Of Jonathan Goossen > Sent: Monday, February 11, 2013 9:20 AM > To: IBM-MAIN@LISTSERV.UA.EDU > Subject: Re: blksize for ML2 migrated dataset via HSM > > I found this in our TMC: > BLKSIZE= 229376 > > I vaguely remember seeing this increase a few versions back along with > some other field sizes. > > IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> wrote on > 02/07/2013 08:04:16 PM: > > > From: retired mainframer > > To: IBM-MAIN@LISTSERV.UA.EDU > > Date: 02/07/2013 08:04 PM > > Subject: Re: blksize for ML2 migrated dataset via HSM > > Sent by: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> > > > > If memory serves, the CA1 TMC uses 16 bits to store the blksize. > Even > when > > treated as unsigned, it won't show more than 65535. > > > > On z/OS 1.11 system, the DFDSS default for DUMP tape blocks is 65520. > I > > doubt if it was reduced for 1.12. There is an installation options > exit > > which can change the default to 32760. If your system is actually > writing > > 16K blocks, then something at your site (such as the DCB parameter on > the DD > > statement) is causing that. > > > > On the other hand, the HSM Storage Administration manual mentions 16K > blocks > > for ML2 tapes so it might not be DFDSS. > > > > :>: -----Original Message----- > > :>: From: IBM Mainframe Discussion List [mailto:IBM- > m...@listserv.ua.edu > ] On > > :>: Behalf Of Houzet Alain > > :>: Sent: Thursday, February 07, 2013 2:26 AM > > :>: To: IBM-MAIN@LISTSERV.UA.EDU > > :>: Subject: blksize for ML2 migrated dataset via HSM > > :>: > > :>: Hello, > > :>: I observed a blksize of 16k for all ml2 migrated dataset (seen on > the > > :>: CA1 product). I use DSS as datamover and > > :>: i'm wondering about the size concerning the blksize. Why dss > don't > use > > :>: 256k since zos 1.12 ? > > :>: Everybody will have an answer. thank's > > > > --------------------------------------------------------------------- > - > > For IBM-MAIN subscribe / signoff / archive access instructions, > > send email to lists...@listserv.ua.edu with the message: INFO IBM- > MAIN > > > This e-mail message and all attachments transmitted with it may > contain legally privileged and/or confidential information intended > solely for the use of the addressee(s). If the reader of this > message is not the intended recipient, you are hereby notified that > any reading, dissemination, distribution, copying, forwarding or > other use of this message or its attachments is strictly > prohibited. If you have received this message in error, please > notify the sender immediately and delete this message and all > copies and backups thereof. Thank you. > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
