The Menu Interface › Allocate New Dataset Parameters Menu (XCICADSN) › Parameter Fields › Block Size

Block Size

Defines the block size of the file.

• If RECFM=F, the LRECL must match the BLKSIZE parameter.
• If RECFM=FB, the BLKSIZE must be a multiple of the LRECL.
• If RECFM=U, CA XCOM Data Transport ignores this parameter.
• For F or FB data sets, allowable LRECL values are 4‑32760 bytes.
• For V and VB files, allowable values are 4‑32756 bytes.
• For FBA and VBM, allowable values are from 5‑32756 bytes.
• For V, VB, VBA and VBM files, the LRECL must be at least 4 bytes less than the BLKSIZE.
• For VBS and VS, allowable values are 256‑32767 bytes.
• For VS and VBS, the LRECL can be larger than the BLKSIZE.

Default: None