sg_write_buffer
(1m)
名前
sg_write_buffer - send a SCSI WRITE BUFFER command
形式
sg_write_buffer [--help] [--id=ID] [--in=FILE]
[--length=LEN] [--mode=MO] [--offset=OFF] [--raw]
[--skip=SKIP] [--specific=MS] [--verbose] [--version] DEVICE
説明
SG3_UTILS SG_WRITE_BUFFER(8)
NAME
sg_write_buffer - send a SCSI WRITE BUFFER command
SYNOPSIS
sg_write_buffer [--help] [--id=ID] [--in=FILE]
[--length=LEN] [--mode=MO] [--offset=OFF] [--raw]
[--skip=SKIP] [--specific=MS] [--verbose] [--version] DEVICE
DESCRIPTION
Sends a SCSI WRITE BUFFER command to DEVICE, along with data
provided by the user. In some cases no data is required, or
data can be read from the file given in the --in=FILE
option, or data is read from stdin when either --raw or
--in=- is given.
Some WRITE BUFFER command variants do not have associated
data to send to the device, for example "activate_mc"
("activate deferred microcode").
OPTIONS
Arguments to long options are mandatory for short options as
well.
-h, --help
output the usage message then exit. If used multiple
times also prints the mode names and their acronyms.
-i, --id=ID
this option sets the buffer id field in the cdb. ID is
a value between 0 (default) and 255 inclusive.
-I, --in=FILE
read data from file FILE that will be sent with the
WRITE BUFFER command. If FILE is '-' then stdin is
read until an EOF is detected (this is the same action
as --raw).
-l, --length=LEN
where LEN is the length, in bytes, of data to be writ-
ten to the device. If not given (and length cannot be
deduced from --in=FILE or --raw) then defaults to zero.
If the option is given and the length deduced from
--in=FILE or --raw is less (or no data is provided),
then bytes of 0xff are used as fill bytes.
-m, --mode=MO
this option sets the mode field in the cdb. MO is a
value between 0 (default) and 31 inclusive. Alterna-
tively an abbreviation can be given. To list the
available mode abbreviations give an invalid one (e.g.
'--mode=xxx') or use the '-hh' option.
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SG3_UTILS SG_WRITE_BUFFER(8)
-o, --offset=OFF
this option sets the buffer offset field in the cdb.
OFF is a value between 0 (default) and 2**24-1 . It is
a byte offset.
-r, --raw
read data from stdin until an EOF is detected. This
data is sent with the WRITE BUFFER command to DEVICE.
The action of this option is the same as using
'--in=-'.
-s, --skip=SKIP
this option is only active when --in=FILE is given and
FILE is a regular file, rather than stdin. Data is read
starting at byte offset SKIP to the end of file (or the
amount given by --length=LEN). If not given the byte
offset defaults to 0 (i.e. the start of the file).
-S, --specific=MS
MS is the mode specific field in the cdb. This is a
3-bit field so the values 0 to 7 are accepted. This
field was introduced in SPC-4 revision 32 and can be
used to specify additional events that activate
deferred microcode (when MO is 0xD).
-v, --verbose
increase the level of verbosity, (i.e. debug output).
-V, --version
print the version string and then exit.
ATTRIBUTES
See attributes(5) for descriptions of the following
attributes:
+---------------+--------------------------+
|ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+---------------+--------------------------+
|Availability | system/storage/sg3_utils |
+---------------+--------------------------+
|Stability | Uncommitted |
+---------------+--------------------------+
NOTES
If no --length=LEN is given this utility reads up to 8 MiB
of data from the given file FILE (or stdin). If a larger
amount of data is required then the --length=LEN option
should be given. The user should be aware that most operat-
ing systems have limits on the amount of data that can be
sent with one SCSI command. In Linux this depends on the
pass through mechanism used (e.g. block SG_IO or the sg
driver) and various setting in sysfs in the linux lk 2.6
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SG3_UTILS SG_WRITE_BUFFER(8)
series (e.g. /sys/block/sda/queue/max_sectors_kb).
Downloading incorrect microcode into a device has the abil-
ity to render that device inoperable. One would hope that
the device vendor verifies the data before activating it. If
the SCSI WRITE BUFFER command is given values in its cdb
(e.g. LEN) that are inappropriate (e.g. too large) then the
device should respond with a sense key of ILLEGAL REQUEST
and an additional sense code of INVALID FIELD in CDB. If a
WRITE BUFFER command (or a sequence of them) fails due to
device vendor verification checks then it should respond
with a sense key of ILLEGAL REQUEST and an additional sense
code of COMMAND SEQUENCE ERROR.
All numbers given with options are assumed to be decimal.
Alternatively numerical values can be given in hexadecimal
preceded by either "0x" or "0X" (or has a trailing "h" or
"H").
EXIT STATUS
The exit status of sg_write_buffer is 0 when it is success-
ful. Otherwise see the sg3_utils(8) man page.
AUTHORS
Written by Luben Tuikov and Douglas Gilbert.
REPORTING BUGS
Report bugs to <dgilbert at interlog dot com>.
COPYRIGHT
Copyright (C) 2006-2011 Luben Tuikov and 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_read_buffer(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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