Usage: sg_read_long [--16] [--correct] [--help] [--lba=LBA] [--out=OF]
                    [--pblock] [--readonly] [--verbose] [--version]
                    [--xfer_len=BTL] DEVICE
  where:
    --16|-S              do READ LONG(16) (default: READ LONG(10))
    --correct|-c         use ECC to correct data (default: don't)
    --help|-h            print out usage message
    --lba=LBA|-l LBA     logical block address (default: 0)
    --out=OF|-o OF       output in binary to file named OF
    --pblock|-p          fetch physical block containing LBA
    --readonly|-r        open DEVICE read-only (def: open it read-write)
    --verbose|-v         increase verbosity
    --version|-V         print version string and exit
    --xfer_len=BTL|-x BTL    byte transfer length (< 10000) default 520

Perform a SCSI READ LONG (10 or 16) command. Reads a single block with
associated ECC data. The user data could be encoded or encrypted.