1SCSI_READCAP(8)                    SG3_UTILS                   SCSI_READCAP(8)
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NAME

6       scsi_readcap - do SCSI READ CAPACITY command on disks
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SYNOPSIS

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

12       This  bourne  shell  script  calls the sg_readcap utility on each given
13       DEVICE. This will send a SCSI READ CAPACITY command to each DEVICE.
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15       The default action of this script is to  send  the  10  byte  cdb  READ
16       CAPACITY(10) command to each DEVICE. If a response indicates the number
17       of blocks is greater than or equal to '2**32 - 1' then the READ  CAPAC‐
18       ITY(16) is sent and its response is output.
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OPTIONS

21       Arguments to long options are mandatory for short options as well.
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23       -b, --brief
24              shortens the output to two hexadecimal numbers, both prefixed by
25              '0x'.  The first number is the number of  blocks  available  and
26              the second is the size of each blocks in bytes (e.g. '0x12a19eb0
27              0x200'). If an error is detected '0x0 0x0'  is  output  and  the
28              script continues if there are more DEVICEs.
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30       -h, --help
31              print out the usage message then exit.
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33       -l, --long
34              the  default  is to send the READ CAPACITY(10) command (i.e. the
35              10 byte cdb variant). When this option is given the READ  CAPAC‐
36              ITY(16) command is sent. The latter command yields more informa‐
37              tion in its response.
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39       -v, --verbose
40              increase level or verbosity.
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EXIT STATUS

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

48       Written by D. Gilbert
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51       Copyright © 2009 Douglas Gilbert
52       This software is distributed under a FreeBSD license. There is NO  war‐
53       ranty;  not  even  for MERCHANTABILITY or FITNESS FOR A PARTICULAR PUR‐
54       POSE.
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SEE ALSO

57       sg_readcap (sg3_utils)
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61sg3_utils-1.28                   October 2009                  SCSI_READCAP(8)
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