Can anybody comment on this: I specify 4000/4000cyl and z/OS allocates 1/4000cyl. The info you guys provided has been very helpful but I don't understand why I'm getting this....
-----Original Message----- From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On Behalf Of R.S. Sent: Friday, December 22, 2006 2:48 PM To: [email protected] Subject: Re: Max Allocation w/ Space= DD Bruce Black wrote: >>The size of a data set is limited to 65,535 tracks per volume except > > for > >>the following types of data sets: >>- Hierarchical File System (HFS) >>- Extended format sequential >>- Partitioned data set extended (PDSE) >>- VSAM - Large format >> >>----- >> >>There is also LBI (Large Block Interface), and if this bit is turned > > on > >>(in the Format 1 DSCB?), then it may also exceed the 65,535 (64K) > > Track > >>limitation. > > You copied it slightly wrong. the last line should be > - VSAM > - Large Format > > the last one is the key. In z/OS 1.7, they introduced Large Format > sequential datasets, which work even on non-SMS volumes. You request > with DSNTYPE=LARGE in JCL or the data class. In this format, a normal > sequential dataset can exceed 65,535 tracks on a volume, up to the > volume size. Some things, like NOTE and POINT are affected but most > programs don't use them. > > I imagine that this is what you meant by LBI, which is actually > something quite different (large blocks on TAPE, nothing to do with > disk). In fact, my first guess was 64k track limit, but 4000 CYL is 60000 tracks. That's less than 64k. -- Radoslaw Skorupka Lodz, Poland ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
