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 synchronized with the medium.
Arguments to long options are mandatory for short options as well.
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
where GROUP 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 feature in SBC-2 and can probably be
ignored for the time being.
output the usage message then exit.
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 (or the
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 .
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.
increase the level of verbosity, (i.e. debug output).
print the version string and then exit.
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.
The exit status of sg_sync is 0 when it is successful. Otherwise see
the sg3_utils(8) man page.