sg_luns(8) [debian man page]
SG_LUNS(8) SG3_UTILS SG_LUNS(8) NAME
sg_luns - send the SCSI REPORT LUNS command SYNOPSIS
sg_luns [--decode] [--help] [--hex] [--maxlen=LEN] [--quiet] [--raw] [--select=SR] [--verbose] [--version] DEVICE DESCRIPTION
Send the SCSI REPORT LUNS command to the DEVICE and outputs the response. In the SPC-3 SCSI standard support for this command is mandatory. OPTIONS
Arguments to long options are mandatory for short options as well. -d, --decode decode logical unit numbers into their hierarchical parts. Interprets luns as described in SAM-3 when the HiSup bit is set in a standard INQUIRY's response. -h, --help output the usage message then exit. -H, --hex output response to this command in ASCII hex. -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 (or LEN is zero) then 8192 is used. The maximum allowed value of LEN is 65536. -q, --quiet output ASCII hex rendering of each report lun, one per line. -r, --raw output response in binary (to stdout). -s, --select=SR this option sets the 'select report' field (SR) in the SCSI REPORT LUNS command. The default value is 0. When 0 is given (or this option is not specified) then the DEVICE should yield a list of luns addressable via this "I_T nexus" that use the following lun addressing methods: logical unit addressing, peripheral device addressing and flat space addressing. When 1 is given the DEVICE should yield a list of only "well known" logical units addressable via this "I_T" nexus. When 2 is given the DEVICE should yield all luns addressable via this "I_T" nexus. To simplify, for the I_T nexus associated with the DEVICE, the meanings of the SR values are: 0 : all luns excluding well known logical units 1 : well known logical units 2 : all luns Values between 0xf8 and 0xff (inclusive) are vendor specific (SPC-4 (rev 32), other values greater than 2 are reserved. -v, --verbose increase the level of verbosity, (i.e. debug output). -V, --version print the version string and then exit. EXIT STATUS
The exit status of sg_luns 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) 2004-2011 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_inq(8) sg3_utils-1.33 August 2011 SG_LUNS(8)
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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)