Post #1
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Sam
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Posts: 28
Joined: 07/01/2026, 02:30 PM
Posted: 08/01/2026, 11:25 AM
Allocating a file and the panel asks for RECFM, LRECL, BLKSIZE. I keep guessing FB / 80 / 0.
What do these actually control?
Allocating a file and the panel asks for RECFM, LRECL, BLKSIZE. I keep guessing FB / 80 / 0.
What do these actually control?
RECFM = record format. FB = fixed blocked (every record same length). VB = variable.
LRECL = length of one record in bytes. 80 is classic card image.
BLKSIZE = how many bytes per block on disk. Often a multiple of LRECL for FB. 0 can mean "let the system pick" in some shops.
Wrong LRECL vs what the program writes = pain later.
If you are cloning an existing file, copy its attributes instead of inventing new ones.
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