sg_sync(8) [debian man page]
SG_SYNC(8) 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 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. 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 numbers are used to segre- gate 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 (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 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) 2004-2009 Douglas Gilbert This software is distributed under a FreeBSD license. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PUR- POSE. SEE ALSO
sg_start(sg3_utils) sg3_utils-1.27 March 2009 SG_SYNC(8)
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SG_GET_LBA_STATUS(8) SG3_UTILS SG_GET_LBA_STATUS(8) NAME
sg_get_lba_status - send the SCSI GET LBA STATUS command SYNOPSIS
sg_get_lba_status [--brief] [--help] [--hex] [--lba=LBA] [--maxlen=LEN] [--raw] [--verbose] [--version] DEVICE DESCRIPTION
Send the SCSI GET LBA STATUS command to the DEVICE and outputs the response. This command was introduced in (draft) SBC-3 revision 20 and devices that support logical block provisioning should support this command. The default action is to decode the response into one LBA status descriptor per line output to stdout. The descriptor LBA is output in hex (prefixed by '0x') and the number of blocks is output in decimal followed by the provisioning status in decimal. The provisioning status can be in the range 0 to 15 of which only 0 (mapped), 1 (unmapped) and 2 (anchored) are used currently. The amount of output can be reduced by the --brief option. OPTIONS
Arguments to long options are mandatory for short options as well. -b, --brief when use once then one LBA status descriptor per line is output to stdout. Each line has this format: "0x<descriptor_LBA> 0x<blocks> <provisioning_status>". So the descriptor LBA and blocks are output in hex and the provisioning status in decimal. When used twice (e.g. '-bb' or '--brief --brief') the the provisioning status of the given LBA (or LBA 0 if the --lba option is not given) is output to stdout. A check is made that the given LBA lies on the range of the first returned LBA status descriptor (as it should according to SBC-3 revision 20) and warnings are sent to stderr if it doesn't. -h, --help output the usage message then exit. -H, --hex output response to this command in ASCII hex. -l, --lba=LBA where LBA is the starting Logical Block Address (LBA) to check the provisioning status for. Note that the DEVICE chooses how many following blocks that it will return provisioning status for. -m, --maxlen=LEN where LEN is the (maximum) response length in bytes. It is placed in the cdb's "allocation length" field. If not given then 24 is used. 24 is enough space for the response header and one LBA status descriptor. LEN should be 8 plus a multiple of 16 (e.g. 24, 40, and 56 are suitable). -r, --raw output response in binary (to stdout). -v, --verbose increase the level of verbosity, (i.e. debug output). Additional output caused by this option is sent to stderr. -V, --version print the version string and then exit. NOTES
In SBC-3 revision 25 the calculation associated with the Parameter Data Length field in the response was modified. Prior to that the byte offset was 8 and in revision 25 it was changed to 4. For a discussion of logical block provisioning see section 4.7 of sbc3r29.pdf at http://www.t10.org (or the corresponding section of a later draft). EXIT STATUS
The exit status of sg_get_lba_status 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) 2009-2012 Douglas Gilbert This software is distributed under a FreeBSD license. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PUR- POSE. SEE ALSO
sg_write_same(8), sg_unmap(8) sg3_utils-1.33 January 2012 SG_GET_LBA_STATUS(8)