ARCHIVE_RECFM=FB -ARCHIVE_LRECL=1024 58. Whats the proper way to create Fixed-Block Archives with PKZIP/SecureZIP for z/OS?
When using ARCHIVE_RECFM=FB for Archives intended for off-system transport (via FTP or other electronic means), ARCHIVE_LRECL should also be tuned. The default is ARCHIVE_RECFM=U, which writes exactly the number of bytes required for the Archive. By changing to ARCHIVE_RECFM=FB, the defaults for ARCHIVE_LRECL & ARCHIVE_BLKSIZE will still be half-track blocking (27998 on 3390 DASD). By leaving the defaults for these parameters alone, the operating system will write a complete record/block combination (rounded to 27998), resulting in dead space at the end of the archive; increasing transmission time and storage space on the target system. It is recommended that ARCHIVE_LRECL be set to a smaller size (ARCHIVE_BLKSIZE will automatically be set by PKZIP for z/OS to match half-track blocking for a given LRECL). This allows the last block of the Archive to be a short block (as governed by QSAM in the operating system) thereby reducing wasted space. The shortening of the ARCHIVE_LRECL must be
