scsi_readcap - do SCSI READ CAPACITY command on disks

       Written by D. Gilbert

       Copyright © 2009-2013 Douglas Gilbert
       This  software  is  distributed  under  a  BSD-2-Clause  license.  There  is  NO  warranty;  not even for
       MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

       This  bash  shell  script  calls  the sg_readcap utility on each given DEVICE. This will send a SCSI READ
       CAPACITY command to each DEVICE.

       The default action of this script is to send the 10 byte cdb READ CAPACITY(10) command to each DEVICE. If
       a response indicates the number of blocks is greater  than  or  equal  to  '2**32  -  1'  then  the  READ
       CAPACITY(16) is sent and its response is output.

       The exit status of this script is 0 when it is successful. Otherwise the exit status is that of the  last
       sg_readcap utility called. See the sg3_utils(8) man page.

       scsi_readcap - do SCSI READ CAPACITY command on disks

       Arguments to long options are mandatory for short options as well.

       -b, --brief
              shortens  the  output  to two hexadecimal numbers, both prefixed by '0x'.  The first number is the
              number of blocks available and the second is the size of each blocks in  bytes  (e.g.  '0x12a19eb0
              0x200').  If  an  error is detected '0x0 0x0' is output and the script continues if there are more
              DEVICEs.

       -h, --help
              print out the usage message then exit.

       -l, --long
              the default is to send the READ CAPACITY(10) command (i.e. the 10 byte  cdb  variant).  When  this
              option  is given the READ CAPACITY(16) command is sent. The latter command yields more information
              in its response.

       -v, --verbose
              increase level or verbosity.

sg_readcap(sg3_utils)

sg3_utils-1.36                                      May 2013                                     SCSI_READCAP(8)

scsi_readcap [--brief] [--help] [--long] [--verbose] DEVICE [DEVICE]*