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SG_GET_LBA_STATUS(8) SG3_UTILS SG_GET_LBA_STATUS(8)
NAME
sg_get_lba_status - send SCSI GET LBA STATUS(16 or 32) command
SYNOPSIS
sg_get_lba_status [--16] [--32] [--brief] [--element-id=EI] [--help] [--hex] [--inhex=FN]
[--lba=LBA] [--maxlen=LEN] [--raw] [--readonly] [--report-type=RT] [--scan-len=SL] [--ver-
bose] [--version] DEVICE
DESCRIPTION
Send the SCSI GET LBA STATUS(16) or GET LBA STATUS(32) command to the DEVICE and output
the response. The 16 byte command variant was introduced in (draft) SBC-3 revision 20 and
devices that support logical block provisioning should support this command. The GET LBA
STATUS(32) command was added in (draft) SBC-4 revision 14.
The default action is to decode the response into one LBA status descriptor per line then
output a header and the status descriptors to stdout. The descriptor LBA is output in hex
(prefixed by '0x') and the number of blocks is output in decimal followed by the provi-
sioning status and additional status in decimal. The provisioning status can be in the
range 0 to 15 of which only 0 (mapped or unknown), 1 (unmapped), 2 (anchored), 3 (mapped)
and 4 (unknown) are used currently. The amount of output can be reduced by the --brief op-
tion.
Rather than send this SCSI command to DEVICE, if the --inhex=FN option is given, then the
contents of the file named FN are decoded as ASCII hex and then processed if it was the
response of this command.
OPTIONS
Arguments to long options are mandatory for short options as well.
-S, --16
send SCSI GET LBA STATUS(16) command which is the 16 byte variant. In the absence
of the --16 or the --32 options the SCSI GET LBA STATUS(16) command is sent. If
both --16 and the --32 options are given then the GET LBA STATUS(16) command is
sent.
-T, --32
send SCSI GET LBA STATUS(32) command which is the 32 byte variant. When given to-
gether with the --16 option then this option is ignored (so the GET LBA STATUS(16)
command is sent).
-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> <addi-
tional_status>". So the descriptor's starting LBA and number of blocks are output
in hex while the provisioning status and additional status are 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 de-
scriptor (as it should according to SBC-3 revision 20) and warnings are sent to
stderr if it doesn't.
-e, --element-id=EI
where EI is the element identifier of the physical element for which the LBAs shall
be reported based on the value in the report type field (i.e. RT). This option is
only active with the SCSI GET LBA STATUS(32) command (i.e. it is ignored if the GET
LBA STATUS(16) command is sent).
Valid element identifiers are non-zero. The default value of EI is 0 which means in
the context that no element identifier is specified.
-h, --help
output the usage message then exit.
-H, --hex
output response to this command in ASCII hex.
-i, --inhex=FN
where FN is a filename whose contents are assumed to be ASCII hexadecimal bytes.
See the "FORMAT OF FILES CONTAINING ASCII HEX" section in the sg3_utils manpage for
more information. If DEVICE is also given then it is ignored. If the --raw option
is also given then the contents of FN are treated as binary.
-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 re-
turn provisioning status for.
-m, --maxlen=LEN
where LEN is the (maximum) response length in bytes. It is placed in the cdb's "al-
location 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) unless the --inhex=FN option is also given.
In that case the input file name (FN) is decoded as binary (and the output is _not_
in binary).
-R, --readonly
open the DEVICE read-only (e.g. in Unix with the O_RDONLY flag). The default is to
open it read-write.
-t, --report-type=RT
where RT is 0 for report all LBAs; 1 for report LBAs using non-zero provisioning
status; 2 for report LBAs that are mapped; 3 for report LBAs that are de-allocated;
4 for report LBAs that are anchored; 16 for report LBAs that may return an unrecov-
ered error. The REPORT TYPE field was added to the GET LBA STATUS cdb in sbc4r12.
Since the REPORT TYPE field is newer than the command, the response contains the
RTP bit to indicate whether or not the DEVICE acts on the REPORT TYE field (set
when it does act on it, clear otherwise).
-s, --scan-len=SL
where SL is the scan length which is the maximum number of contiguous logical
blocks to be scanned for logical blocks that meet the given report type (i.e. RT).
This option is only active with the SCSI GET LBA STATUS(32) command (i.e. it is ig-
nored if the GET LBA STATUS(16) command is sent).
The default value of SL is 0 which should be interpreted by the DEVICE as there is
no limits to the number of LBAs that shall be scanned.
-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 sbc4r14.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) 2009-2019 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), sg3_utils(8)
sg3_utils-1.45 August 2019 SG_GET_LBA_STATUS(8)
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