sg_opcodes
(1m)
名称
sg_opcodes - reports information on supported SCSI commands
or task management functions
用法概要
sg_opcodes [--alpha] [--help] [--hex] [--no-inquiry]
[--opcode=OP] [--raw] [--rctd] [--repd] [--sa=SA] [--tmf]
[--unsorted] [--verbose] [--version] DEVICE
sg_opcodes [-a] [-n] [-o=OP] [-q] [-R] [-s=SA] [-t] [-u]
[-v] [-V] [-?] DEVICE
描述
SG3_UTILS SG_OPCODES(8)
NAME
sg_opcodes - reports information on supported SCSI commands
or task management functions
SYNOPSIS
sg_opcodes [--alpha] [--help] [--hex] [--no-inquiry]
[--opcode=OP] [--raw] [--rctd] [--repd] [--sa=SA] [--tmf]
[--unsorted] [--verbose] [--version] DEVICE
sg_opcodes [-a] [-n] [-o=OP] [-q] [-R] [-s=SA] [-t] [-u]
[-v] [-V] [-?] DEVICE
DESCRIPTION
This utility sends a SCSI REPORT SUPPORTED OPERATION CODES
or a REPORT SUPPORTED TASK MANAGEMENT FUNCTIONS command to
the DEVICE and then outputs the response. The default action
is to report supported operation codes. In this mode it will
either list all supported commands or give detailed informa-
tion on a specific command identified by the --opcode=OP
option (perhaps with additional information from the --sa=SA
option).
The name of a SCSI command depends on its peripheral device
type (e.g. a disk). The REPORT SUPPORTED OPERATION CODES and
REPORT SUPPORTED TASK MANAGEMENT FUNCTIONS commands are not
supported in the MMC command set for CD and DVD devices.
This utility does an INQUIRY to obtain the peripheral device
type and prints out the vendor, product and revision
strings.
A similar facility to query supported operation codes previ-
ously was available via the CmdDt bit in the SCSI INQUIRY
command (see sg_inq(8)). However that facility was made
obsolete and replaced by the REPORT SUPPORTED OPERATION
CODES command in SPC-3 (revision 4) during February 2002.
This utility supports two command line syntaxes, the pre-
ferred one is shown first in the synopsis and explained in
this section. A later section on the old command line syntax
outlines the second group of options.
OPTIONS
Arguments to long options are mandatory for short options as
well.
-a, --alpha
when all supported commands are being listed there is
no requirement for the device server (i.e. the DEVICE)
to sort the list of commands. When this option is given
the list of supported commands is sorted by name
(alphabetically). When this option and the --unsorted
option are both _not_ given then the list of supported
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commands is sorted numerically (first by operation code
and then by service action).
-h, --help
outputs the usage message summarizing command line
options then exits. Ignores DEVICE if given.
-H, --hex
outputs the response in ASCII hexadecimal to stdout.
-n, --no-inquiry
Prior to calling a SCSI REPORT SUPPORTED OPERATION
CODES or a REPORT SUPPORTED TASK MANAGEMENT FUNCTIONS
command, a SCSI INQUIRY command is performed. The rea-
son is to determine the peripheral device type (pdt) of
the DEVICE as this is helpful in translating operation
codes to the command names. By default this utility
prints a summary of INQUIRY command response on stdout.
If this option (or the --raw option) is given then that
summary is not printed on stdout.
-O, --old
switch to older style options.
-o, --opcode=OP
the DEVICE will be queried for the given operation code
( i.e. the OP value) which is the first byte of a SCSI
command. OP is decimal unless prefixed by "0x" or it
has a trailing "h". OP should be in the range 0 to 255
(0xff) inclusive. When this option is not given then
all available SCSI commands supported by the DEVICE are
listed.
-r, --raw
output the response in binary to stdout. Error messages
and warnings, if any, are sent to stderr.
-R, --rctd
set report command timeout descriptor (RCTD) bit in the
cdb. The response may or may not contain command time-
out descriptors. If available they are output. If sup-
ported there are two values: a nominal command timeout
and a recommended command timeout. Both have units of
seconds. A value of zero means that no timeout is indi-
cated and this is shown in the corresponding decoded
output as "-".
-q, --repd
set read extended parameter data (REPD) bit in the
report task management functions cdb. 16 bytes rather
than the default 4 bytes expected in the response. This
was added in SPC-4 (revision 26).
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-s, --sa=SA
the DEVICE will be queried for a command with the given
service action (i.e. the SA value). Used in conjunction
with the --opcode=OP option. If this option is not
given, --opcode=OP is given and the command in question
does have a service action then a value of 0 will be
assumed. SA is decimal and expected to be in the range
0 to 65535 (0xffff) inclusive.
-t, --tmf
list supported task management functions. This is done
with the SCSI REPORT SUPPORTED TASK MANAGEMENT FUNC-
TIONS command. When this option is chosen the --alpha,
--opcode=OP, --rctd, --sa=SA and --unsorted options are
ignored.
-u, --unsorted
when all supported commands are being listed there is
no requirement for the device server (i.e. the DEVICE)
to sort the list of commands. When this option is given
the list of supported commands is in the order given by
the DEVICE. When this option is not given the supported
commands are sorted numerically (first by operation
code and then by service action).
-v, --verbose
increase level of verbosity. Can be used multiple
times.
-V, --version
print out version string then exit.
ATTRIBUTES
See attributes(5) for descriptions of the following
attributes:
+---------------+--------------------------+
|ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+---------------+--------------------------+
|Availability | system/storage/sg3_utils |
+---------------+--------------------------+
|Stability | Uncommitted |
+---------------+--------------------------+
NOTES
As of SPC-4 revision 7a the recognized task management func-
tions are: abort set, abort task set, clear ACA, clear task
set, I_T nexus reset, logical unit reset, query task, target
reset and wakeup. As of SPC-4 revision 26 target reset and
wakeup have been made obsolete while query task set and
query asynchronous event notification have been added.
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In the 2.4 series of Linux kernels the DEVICE must be a SCSI
generic (sg) device. In the 2.6 series block devices (e.g.
SCSI disks and DVD drives) can also be specified. For exam-
ple "sg_opcodes /dev/sda" will work in the 2.6 series ker-
nels.
EXIT STATUS
The exit status of sg_opcodes is 0 when it is successful.
Otherwise see the sg3_utils(8) man page.
OLDER COMMAND LINE OPTIONS
The options in this section were the only ones available
prior to sg3_utils version 1.23 . In sg3_utils version 1.23
and later these older options can be selected by either set-
ting the SG3_UTILS_OLD_OPTS environment variable or using
'--old' (or '-O) as the first option.
-a sort command alphabetically. Equivalent to --alpha in
main description.
-n don't print a summary of the SCSI INQUIRY response on
stdout.
-N switch to the newer style options.
-o=OP
the DEVICE will be queried for the given operation code
(i.e. OP) which is the first byte of a SCSI command.
OP is hexadecimal and expected to be in the range 0 to
ff inclusive. When this option is not given then all
available SCSI commands supported by the DEVICE are
listed.
-q set the read extended parameter data (REPD) bit in
report TMF cdb. Equivalent to --repd in main descrip-
tion.
-R set the report command timeout descriptor (RCTD) bit in
cdb. Equivalent to --rctd in main description.
-s=SA
the DEVICE will be queried for a command with the given
service action (i.e. SA). Used in conjunction with the
-o=OP option. If this option is not given, -o=OP is
given and the command in question does have a service
action then a value of 0 will be assumed. SA is hexa-
decimal and expected to be in the range 0 to ffff
inclusive.
-t list supported task management functions. Equivalent to
--tmf in the main description.
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-u output all supported commands in the order given by
DEVICE. Equivalent to --unsorted in main description.
-v increase level of verbosity. Can be used multiple
times.
-V print out version string then exit.
-? output usage message. Ignore all other parameters.
EXAMPLES
The examples in this page use Linux device names. For suit-
able device names in other supported Operating Systems see
the sg3_utils(8) man page.
To see the information about a specific command give its
operation code to the '--op=' option. A command line invoca-
tion is shown first followed by a typical response:
# sg_opcodes --op=93h /dev/sdb
Opcode=0x93
Command_name: Write same(16)
Command supported [conforming to SCSI standard]
Usage data: 93 e2 00 00 00 00 ff ff ff ff 00 00 ff ff 00
00
The next example shows the supported task management func-
tions:
# sg_opcodes --tmf -n /dev/sdb
Task Management Functions supported by device:
Abort task
Abort task set
Clear ACA
Clear task set
Logical unit reset
Query task
AUTHOR
Written by Doug Gilbert
REPORTING BUGS
Report bugs to <dgilbert at interlog dot com>.
COPYRIGHT
Copyright (C) 2004-2011 Douglas Gilbert
This software is distributed under the GPL version 2. There
is NO warranty; not even for MERCHANTABILITY or FITNESS FOR
A PARTICULAR PURPOSE.
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SEE ALSO
sg_inq(sg3_utils)
This software was built from source available at
https://java.net/projects/solaris-userland. The original
community source was downloaded from
http://sg.danny.cz/sg/p/sg3_utils-1.33.tgz
Further information about this software can be found on the
open source community website at
http://sg.danny.cz/sg/sg3_utils.html.
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