scsi_readcap(8) - phpMan

SCSI_READCAP(8)                             SG3_UTILS                             SCSI_READCAP(8)

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 vari-
              ant). 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
       Copyright (C) 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)

sg3_utils-1.36                               May 2013                             SCSI_READCAP(8)

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