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Some questions about BSAM files on DOS/VS


 

Hello everybody

I know that my questions may be stupid but ..

1. How to remove (delete) BSAM dataset from DASD? In MVS I just use DISP=DELETE and IEFBR14, but how to remove sequenced dataset, previously allocated with DLBL and EXTENTs in JCL?
2. If I define DLBL and EXTENTs in JCL, but phase exuting in HOB STEP not touch (open, write) the file - will? any extend will be allocated and enty in VTOC created?
3. If I have 2 extents defined, and program write data only for one extend (small record) will second extent will be allocated?

I have strange observation and could not find the answers in available documentation

Thanks
Piotr?

P.S
Sorry for my unfinished previous message, I've incidentally press the enter.

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