bionic (8) sg_get_lba_status.8.gz

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

NAME
       sg_get_lba_status - send SCSI GET LBA STATUS command


SYNOPSIS
       sg_get_lba_status  [--brief] [--help] [--hex] [--lba=LBA] [--maxlen=LEN] [--raw] [--readonly] [--verbose]
       [--version] DEVICE


DESCRIPTION
       Send the SCSI GET LBA STATUS command to the DEVICE and outputs the response. This command was  introduced
       in  (draft)  SBC-3  revision  20  and devices that support logical block provisioning should support this
       command.

       The default action is to decode the response into one LBA status descriptor per line  output  to  stdout.
       The  descriptor  LBA  is  output  in hex (prefixed by '0x') and the number of blocks is output in decimal
       followed by the provisioning status in decimal. The provisioning status can be in the range 0  to  15  of
       which  only  0  (mapped),  1  (unmapped) and 2 (anchored) are used currently. The amount of output can be
       reduced by the --brief option.


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

       -b, --brief
              when use once then one LBA status descriptor per line is output to stdout.   Each  line  has  this
              format:  "0x<descriptor_LBA>   0x<blocks> <provisioning_status>". So the descriptor's starting LBA
              and number of blocks are output in hex and the provisioning status in  decimal.  When  used  twice
              (e.g.  '-bb'  or '--brief --brief') then the provisioning status of the given LBA (or LBA 0 if the
              --lba option is not given) is output to stdout. A check is made that the given  LBA  lies  in  the
              range  of  the  first returned LBA status descriptor (as it should according to SBC-3 revision 20)
              and warnings are sent to stderr if it doesn't.

       -h, --help
              output the usage message then exit.

       -H, --hex
              output response to this command in ASCII hex.

       -l, --lba=LBA
              where LBA is the starting Logical Block Address (LBA) to check the provisioning status  for.  Note
              that the DEVICE chooses how many following blocks that it will return provisioning status for.

       -m, --maxlen=LEN
              where LEN is the (maximum) response length in bytes. It is placed in the cdb's "allocation length"
              field. If not given then 24 is used. 24 is enough space for the response header and one LBA status
              descriptor.  LEN should be 8 plus a multiple of 16 (e.g. 24, 40, and 56 are suitable).

       -r, --raw
              output response in binary (to stdout).

       -R, --readonly
              open  the  DEVICE  read-only  (e.g.  in  Unix  with the O_RDONLY flag).  The default is to open it
              read-write.

       -v, --verbose
              increase the level of verbosity, (i.e. debug output). Additional output caused by this  option  is
              sent to stderr.

       -V, --version
              print the version string and then exit.


NOTES
       In  SBC-3 revision 25 the calculation associated with the Parameter Data Length field in the response was
       modified. Prior to that the byte offset was 8 and in revision 25 it was changed to 4.

       For a discussion of logical block provisioning see section 4.7 of sbc3r29.pdf at  http://www.t10.org  (or
       the corresponding section of a later draft).


EXIT STATUS
       The exit status of sg_get_lba_status is 0 when it is successful. Otherwise see the sg3_utils(8) man page.


AUTHORS
       Written by Douglas Gilbert.


REPORTING BUGS
       Report bugs to <dgilbert at interlog dot com>.


       Copyright © 2009-2014 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_write_same(8), sg_unmap(8)