SG_SYNC(8) SG3_UTILS SG_SYNC(8) NAME sg_sync - send SCSI SYNCHRONIZE CACHE command SYNOPSIS sg_sync [--16] [--count=COUNT] [--group=GN] [--help] [--immed] [--lba=LBA] [--sync-nv] [--timeout=SECS] [--verbose] [--version] DEVICE DESCRIPTION Send SYNCHRONIZE CACHE(10) or SYNCHRONIZE CACHE(16) command to DEVICE. These commands are defined for SCSI block devices (see SBC-3). If success- ful these commands make sure that any blocks whose latest versions are held in cache are written to (also termed as "synchronized with") the medium. 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 includ- ing 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 synchronized with the medium. OPTIONS Arguments to long options are mandatory for short options as well. -S, --16 performs a SYNCHRONIZE CACHE(16) command. Default is to perform a SYNCHRONIZE CACHE(10) command. -c, --count=COUNT where COUNT is the number of blocks to synchronize from and includ- ing LBA. Default value is 0. When 0 then all blocks in the 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 63 inclu- sive. The default value is 0 . Group numbers 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 cache to be synchronized with (i.e. written to) the medium. -l, --lba=LBA where LBA is the lowest logical block address in the cache to syn- chronize to the medium. Default value is 0 . -s, --sync-nv synchronize the (volatile) cache with the non-volatile cache. With- out this option (or if there is no non-volatile cache in the device) the synchronization is with the medium. The SYNC_NV bit was made ob- solete in SBC-3 revision 35d. -t, --timeout=SECS where SECS is the number of seconds the OS allows the SYNCHRONIZE CACHE(16) to complete before it tries to cancel the command. Can- celling commands (typically with the task management function "abort task") is best avoided. Note this option is only active together with the --16 option. The default timeout is 60 seconds for both SYNCHRONIZE CACHE(10) and SYNCHRONIZE CACHE(16). Note that timeout issues can be avoided with the --immed option. -v, --verbose increase the level of verbosity, (i.e. debug output). -V, --version print the version string and then exit. NOTES With the SYNCHRONIZE CACHE(16) command LBA can be up to 64 bits in size and COUNT up to 32 bits in size. With the SYNCHRONIZ CACHE(10) command LBA can be up to 32 bits in size and COUNT up to 16 bits in size. Various numeric arguments (e.g. LBA) may include multiplicative 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. 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 (C) 2004-2018 Douglas Gilbert This software is distributed under a BSD-2-Clause license. There is NO war- ranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. SEE ALSO sg_start(sg3_utils) sg3_utils-1.43 May 2018 SG_SYNC(8)
NAME | SYNOPSIS | DESCRIPTION | OPTIONS | NOTES | EXIT STATUS | AUTHORS | REPORTING BUGS | COPYRIGHT | SEE ALSO
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