Manual Reference Pages - SG_GET_LBA_STATUS (8)
sg_get_lba_status - send SCSI GET LBA STATUS command
sg_get_lba_status [--brief] [--help] [--hex] [--lba=LBA]
[--maxlen=LEN] [--raw] [--readonly]
[--verbose] [--version] DEVICE
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
Arguments to long options are mandatory for short options as well.
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
descriptors 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 doesnt.
output the usage message then exit.
output response to this command in ASCII hex.
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.
where LEN is the (maximum) response length in bytes. It is placed in
the cdbs "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).
output response in binary (to stdout).
open the DEVICE read-only (e.g. in Unix with the O_RDONLY flag).
The default is to open it read-write.
increase the level of verbosity, (i.e. debug output). Additional output
caused by this option is sent to stderr.
print the version string and then exit.
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).
The exit status of sg_get_lba_status is 0 when it is successful. Otherwise
see the sg3_utils(8) man page.
Written by Douglas Gilbert.
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.
|sg3_utils-1.39 ||SG_GET_LBA_STATUS (8) ||May 2014 |
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