sg_luns - send the SCSI REPORT LUNS command


sg_luns [--decode] [--help] [--hex] [--maxlen=LEN] [--quiet] [--raw] [--select=SR] [--verbose] [--version] DEVICE


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.


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 65536 is used. The maximum 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 greater than 2 are reserved (at SPC-4 (rev 8)).
-v, --verbose
 increase the level of verbosity, (i.e. debug output).
-V, --version
 print the version string and then exit.


The exit status of sg_luns 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 © 2004-2008 Douglas Gilbert This software is distributed under a FreeBSD license. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.



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