sg_sync
(1m)
Name
sg_sync - send the scsi command synchronize cache
Synopsis
sg_sync [--count=COUNT] [--group=GROUP] [--help] [--immed]
[--lba=LBA] [--sync-nv] [--verbose] [--version] DEVICE
Description
SG3_UTILS SG_SYNC(8)
NAME
sg_sync - send the scsi command synchronize cache
SYNOPSIS
sg_sync [--count=COUNT] [--group=GROUP] [--help] [--immed]
[--lba=LBA] [--sync-nv] [--verbose] [--version] DEVICE
DESCRIPTION
Send SYNCHRONIZE CACHE (10) command to DEVICE. This command
is defined for SCSI block devices (see SBC-2). If successful
this command makes sure that any blocks whose latest ver-
sions are held in (volatile) cache are written to (also
termed as "synchronized with") the medium. If the --sync-nv
option is given and the device has a non-volatile cache then
any blocks whose latest versions are held in volatile cache
are written to non-volatile cache.
If the LBA and COUNT arguments are both zero (their
defaults) then all blocks in the cache are synchronized. If
LBA is greater than zero while COUNT is zero then blocks in
the cache whose addresses are from and including LBA to the
highest lba on the device are synchronized. If both LBA and
COUNT are non zero then blocks in the cache whose addresses
lie in the range LBA to LBA+COUNT-1 inclusive are synchro-
nized with the medium.
OPTIONS
Arguments to long options are mandatory for short options as
well.
-c, --count=COUNT
where COUNT is the number of blocks to synchronize from
and including LBA. Default value is 0. When 0 then all
blocks in the (volatile) cache from and including LBA
argument to the highest block address are synchronized.
-g, --group=GROUP
where GROUP is the group number which can be between 0
and 31 inclusive. The default value is 0 . Group num-
bers are used to segregate data collected within the
device. This is a new feature in SBC-2 and can probably
be ignored for the time being.
-h, --help
output the usage message then exit.
-i, --immed
sets the IMMED bit in the SYNCHRONIZE CACHE command.
This instructs the device, if the format of the command
is acceptable, to return a GOOD status immediately
rather than wait for the blocks in the (volatile) cache
to be synchronized with (i.e. written to) the medium
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SG3_UTILS SG_SYNC(8)
(or the non-volatile cache).
-l, --lba=LBA
where LBA is the lowest logical block address in the
(volatile) cache to synchronize to the medium (or the
non-volatile cache). Default value is 0 .
-s, --sync-nv
synchronize the (volatile) cache with the non-volatile
cache. Without this option (or if there is no
non-volatile cache in the device) the synchronization
is with the medium.
-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
Various numeric arguments (e.g. LBA) may include multiplica-
tive suffixes or be given in hexadecimal. See the "NUMERIC
ARGUMENTS" section in the sg3_utils(8) man page.
EXIT STATUS
The exit status of sg_sync is 0 when it is successful. Oth-
erwise 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) 2004-2009 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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SG3_UTILS SG_SYNC(8)
SEE ALSO
sg_start(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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