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man pages section 8: System Administration Commands

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Updated: Thursday, June 13, 2019
 
 

scsi_readcap (8)

Name

scsi_readcap - do SCSI READ CAPACITY command on disks

Synopsis

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

Description

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  CAPAC-
       ITY(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  CAPAC-
              ITY(16) command is sent. The latter command yields more informa-
              tion 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  war-
       ranty;  not  even  for MERCHANTABILITY or FITNESS FOR A PARTICULAR PUR-
       POSE.


ATTRIBUTES
       See attributes(7) for descriptions of the following attributes:


       +---------------+--------------------------+
       |ATTRIBUTE TYPE |     ATTRIBUTE VALUE      |
       +---------------+--------------------------+
       |Availability   | system/storage/sg3_utils |
       +---------------+--------------------------+
       |Stability      | Pass-through uncommitted |
       +---------------+--------------------------+
SEE ALSO
       sg_readcap (sg3_utils)



NOTES
       This    software    was    built    from    source     available     at
       https://github.com/oracle/solaris-userland.    The  original  community
       source was downloaded from  http://sg.danny.cz/sg/p/sg3_utils-1.42.tgz

       Further information about this software can be found on the open source
       community website at http://sg.danny.cz/sg/sg3_utils.html.



sg3_utils-1.36                     May 2013                    SCSI_READCAP(8)