what is lrec=f,what is difference between f,fb,v,vb?what is
default value?how do we came to know that records are in
f,fb,v,vb?

Answer Posted / arthi

DCB=(RECFM=F,LRECL=80,BLKSIZE=800)

RECFM - to specify the record format
F-Fixed length record
V-Variable length record
FB-Fixed Block
VB-Variable Block
U-Undefined

for fixed length record the BLKSIZE is multiple of LRECL. For variable length records, BLKSIZE is multiple of (largest record+4)

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