sg_dd: 5.86 20151219

Usage: sg_dd [bs=BS] [count=COUNT] [ibs=BS] [if=IFILE] [iflag=FLAGS] [obs=BS] [of=OFILE] [oflag=FLAGS] [seek=SEEK] [skip=SKIP] [--help] [--version] [blk_sgio=0|1] [bpt=BPT] [cdbsz=6|10|12|16] [coe=0|1|2|3] [coe_limit=CL] [dio=0|1] [odir=0|1] [of2=OFILE2] [retries=RETR] [sync=0|1] [time=0|1] [verbose=VERB] where: blk_sgio 0->block device use normal I/O(def), 1->use SG_IO bpt is blocks_per_transfer (default is 128 or 32 when BS>=2048) bs block size (default is 512) cdbsz size of SCSI READ or WRITE cdb (default is 10) coe 0->exit on error (def), 1->continue on sg error (zero fill), 2->also try read_long on unrecovered reads, 3->and set the CORRCT bit on the read long coe_limit limit consecutive 'bad' blocks on reads to CL times when COE>1 (default: 0 which is no limit) count number of blocks to copy (def: device size) dio for direct IO, 1->attempt, 0->indirect IO (def) ibs input block size (if given must be same as 'bs=') if file or device to read from (def: stdin) iflag comma separated list from: [coe,dio,direct,dpo,dsync,excl, flock,fua,nocache,null,sgio] obs output block size (if given must be same as 'bs=') odir 1->use O_DIRECT when opening block dev, 0->don't(def) of file or device to write to (def: stdout), OFILE of '.' treated as /dev/null of2 additional output file (def: /dev/null), OFILE2 should be normal file or pipe oflag comma separated list from: [append,coe,dio,direct,dpo, dsync,excl,flock,fua,nocache,null,sgio,sparse] retries retry sgio errors RETR times (def: 0) seek block position to start writing to OFILE skip block position to start reading from IFILE sync 0->no sync(def), 1->SYNCHRONIZE CACHE on OFILE after copy time 0->no timing(def), 1->time plus calculate throughput verbose 0->quiet(def), 1->some noise, 2->more noise, etc --help print out this usage message then exit --version print version information then exit copy from IFILE to OFILE, similar to dd command; specialized for SCSI devices