sg_compare_and_write: version: 1.14 20160121

Usage: sg_compare_and_write [--dpo] [--fua] [--fua_nv] [--group=GN] [--help] --in=IF [--inw=WF] --lba=LBA [--num=NUM] [--quiet] [--timeout=TO] [--verbose] [--version] [--wrpotect=WP] [--xferlen=LEN] DEVICE where: --dpo|-d set the dpo bit in cdb (def: clear) --fua|-f set the fua bit in cdb (def: clear) --fua_nv|-F set the fua_nv bit in cdb (def: clear) --group=GN|-g GN GN is GROUP NUMBER to set in cdb (def: 0) --help|-h print out usage message --in=IF|-i IF IF is a file containing a compare buffer and optionally a write buffer (when --inw=WF is not given) --inw=WF|-D WF WF is a file containing a write buffer --lba=LBA|-l LBA LBA of the first block to compare and write --num=NUM|-n NUM number of blocks to compare/write (def: 1) --quiet|-q suppress MISCOMPARE report to stderr, still sets exit status of 14 --timeout=TO|-t TO timeout for the command (def: 60 secs) --verbose|-v increase verbosity (use '-vv' for more) --version|-V print version string then exit --wrprotect=WP|-w WP write protect information (def: 0) --xferlen=LEN|-x LEN number of bytes to transfer. Default is (2 * NUM * 512) or 1024 when NUM is 1 Performs a SCSI COMPARE AND WRITE operation.