Usage: sg_write_attr [--element=EA] [--enumerate] [--help] [--hex]
                     [--in=FN] [--lvn=LVN] [--partition=PN] [--raw]
                     [--verbose] [--version] [--wtc] DEVICE
                     [attr=value [attr=value ...]]
  where:
    --enumerate|-e     enumerate known attributes and service actions
    --element=EA|-E EA    EA is placed in 'element address' field in
                          cdb [SMC-3] (def: 0)
    --help|-h          print out usage message
    --hex|-H           input file contains attribute list in hex format
    --in=FN|-i FN      FN is a filename containing attribute-value pairs
                       or attribute list in binary/hex format
                       if used with --raw or --hex
    --lvn=LVN|-l LVN        logical volume number (LVN) (def:0)
    --partition=PN|-p PN    partition number (PN) (def:0)
    --raw|-r           input file contains binary attribute list
    --verbose|-v       increase verbosity
    --version|-V       print version string and exit
    --wtc|-c           set WRITE THROUGH CACHE bit in cdn (def: clear)

Performs a SCSI WRITE ATTRIBUTE command. Even though it is defined in
SPC-3 and later it is typically used on tape systems.