sg_sync man page on SuSE
[printable version]
SG_SYNC(8) SG3_UTILS SG_SYNC(8)
NAME
sg_sync - send SCSI SYNCHRONIZE CACHE command
SYNOPSIS
sg_sync [--count=COUNT] [--group=GN] [--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 versions 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=GN
where GN is the group number which can be between 0 and 31
inclusive. The default value is 0 . Group numbers are used to
segregate data collected within the device. This is a new fea‐
ture 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 accept‐
able, 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 (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.
NOTES
Various numeric arguments (e.g. LBA) may include multiplicative suf‐
fixes 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. 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 © 2004-2012 Douglas Gilbert
This software is distributed under a FreeBSD license. There is NO war‐
ranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PUR‐
POSE.
SEE ALSO
sg_start(sg3_utils)
sg3_utils-1.35 November 2012 SG_SYNC(8)
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