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SG_GET_LBA_STATUS(8) SG3_UTILS SG_GET_LBA_STATUS(8)
NAME
sg_get_lba_status - send the SCSI GET LBA STATUS command
SYNOPSIS
sg_get_lba_status [--brief] [--help] [--hex] [--lba=LBA] [--maxlen=LEN] [--raw] [--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 LBA and blocks are output in hex and the provisioning status in decimal. When
used twice (e.g. '-bb' or '--brief --brief') the 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 on 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).
-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
Copyright (C) 2009-2012 Douglas Gilbert
This software is distributed under a FreeBSD license. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PUR-
POSE.
SEE ALSO
sg_write_same(8), sg_unmap(8)
sg3_utils-1.33 January 2012 SG_GET_LBA_STATUS(8)