bionic (8) scsi_readcap.8.gz

Provided by: sg3-utils_1.42-2ubuntu1.18.04.2_amd64 bug

NAME
       scsi_readcap - do SCSI READ CAPACITY command on disks


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


DESCRIPTION
       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.


OPTIONS
       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.


EXIT STATUS
       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.


AUTHORS
       Written by D. Gilbert


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


SEE ALSO
       sg_readcap (sg3_utils)