Provided by: sg3-utils_1.27-0.1_i386 bug

NAME

       sg_sat_set_featutes  -  sends  a ATA SET FEATURES command via a SCSI to
       ATA Translation (SAT) layer

SYNOPSIS

       sg_sat_set_features [--count=CO] [--chk_cond] [--feature=FEA]  [--help]
       [--len=16|12] [--lba=LBA] [--verbose] [--version] DEVICE

DESCRIPTION

       This  utility  sends  an  ATA SET FEATURES command to the DEVICE.  This
       command is used to change settings of ATA non-packet (i.e.  disks)  and
       packet  devices (e.g. cd/dvd drives). Rather than send the SET FEATURES
       command directly to the device it is sent via a SCSI transport which is
       assumed  to  contain  a SCSI to ATA Translation (SAT) Layer (SATL). The
       SAT standard (SAT ANSI INCITS 431-2007;  prior  draft:  sat-r09.pdf  at
       www.t10.org)  defines two SCSI "ATA PASS-THROUGH" commands: one using a
       16 byte "cdb" and the other with a 12 byte cdb. This  utility  defaults
       to the 16 byte cdb variant.

       The  SATL  may  be  in  an operating system driver, in host bus adapter
       firmware or in some external enclosure.

       The features can be read using the sg_sat_identify utility  which  uses
       either the ATA IDENTIFY DEVICE (for non-packet devices) or the IDENTIFY
       PACKET DEVICE (for packet devices) command.

OPTIONS

       Arguments to long options are mandatory for short options as well.

       -c, --count=CO
              the number CO is placed in the "count"  field  in  the  ATA  SET
              FEATURES  command.  Only  some  subcommands (a term used for the
              value placed in the "feature" field) require the count field  to
              be set.  The default value placed in the "count" field is 0.

       -C, --chk_cond
              sets  the  CK_COND  bit  in  the  ATA PASS-THROUGH SCSI cdb. The
              default setting is clear (i.e. 0).  When  set  the  SATL  should
              yield   a  sense  buffer  containing  a  ATA  Result  descriptor
              irrespective of whether the ATA  command  succeeded  or  failed.
              When  clear the SATL should only yield a sense buffer containing
              a ATA Result descriptor if the ATA command failed.

       -f, --feature=FEA
              the value FEA is placed in the "feature" field in  the  ATA  SET
              FEATURES  command.  The  term "subcommand" is sometimes used for
              this value. The default value placed in the "feature" field is 0
              which  is  reserved  and  hence  should not change anything. Two
              common examples are 2h to enable the  write  cache  and  82h  to
              disable it.

       -h, --help
              outputs  the usage message summarizing command line options then
              exits. Ignores DEVICE if given.

       -l, --len=16 | 12
              this is the length of the SCSI cdb used for the ATA PASS-THROUGH
              commands.   The  argument can either be 16 or 12. The default is
              16. Some SCSI transports cannot convey SCSI commands longer than
              12 bytes.

       -L, --lba=LBA
              the  number  LBA  is  placed  in  the "lba" field in the ATA SET
              FEATURES command. Only some subcommands (a  term  used  for  the
              value placed in the "feature" field) require the lba field to be
              set.  This value is not a "logical block address" as the acronym
              might  imply.  The default value placed in the "lba" field is 0.

       -v, --verbose
              increases the level or verbosity.

       -V, --version
              print out version string

NOTES

       In the 2.4 series of Linux kernels the DEVICE must be  a  SCSI  generic
       (sg)  device.  In  the  2.6  series block devices (e.g. disks and ATAPI
       DVDs) can also be specified. For example "sg_inq /dev/sda" will work in
       the  2.6  series  kernels. From lk 2.6.6 other SCSI "char" device names
       may be used as well (e.g. "/dev/st0m").

EXIT STATUS

       The exit status of sg_sat_set_features is  0  when  it  is  successful.
       Otherwise see the sg3_utils(8) man page.

AUTHOR

       Written by Doug Gilbert

REPORTING BUGS

       Report bugs to <dgilbert at interlog dot com>.

COPYRIGHT

       Copyright © 2007 Douglas Gilbert
       This  software  is  distributed  under  a  FreeBSD license. There is NO
       warranty; not even for MERCHANTABILITY  or  FITNESS  FOR  A  PARTICULAR
       PURPOSE.

SEE ALSO

       sg_sat_identify(sg3_utils),      sg_inq(sg3_utils),     sdparm(sdparm),
       hdparm(hdparm)