Provided by: sg3-utils_1.33-1_amd64 bug

NAME

       sg_sat_identify  -  sends  a  ATA  IDENTIFY  (PACKET)  DEVICE  command  via  a SCSI to ATA
       Translation (SAT) layer

SYNOPSIS

       sg_sat_identify  [--ck_cond]  [--extend]   [--help]   [--hex]   [--indent]   [--len=16|12]
       [--packet] [--raw] [--verbose] [--version] DEVICE

DESCRIPTION

       This  utility sends either an ATA IDENTIFY DEVICE command or an ATA IDENTIFY PACKET DEVICE
       command to DEVICE and outputs the response. The devices that respond to these commands are
       ATA disks and ATAPI devices respectively.  Rather than send these commands directly to the
       device they are sent via a SCSI transport which is  assumed  to  contain  a  SCSI  to  ATA
       Translation (SAT) Layer (SATL). The SATL may be in an operating system driver, in host bus
       adapter firmware or in some external enclosure.

       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 using the 16 byte cdb variant.  SAT-2  is  also  a
       standard:  SAT-2  ANSI  INCITS  465-2010  and the draft prior to that is sat2r09.pdf . The
       SAT-3 project has started and the most recent draft is sat3r01.pdf .

OPTIONS

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

       -c, --ck_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 command succeeded or failed. When clear  the
              SATL  should  only  yield  a sense buffer containing a ATA Result descriptor if the
              command failed.

       -e, --extend
              sets the EXTEND bit in the ATA PASS-THROUGH SCSI cdb. The default setting is  clear
              (i.e.  0).  When set a 48 bit LBA command is sent to the device. This option has no
              effect when --len=12.

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

       -H, --hex
              outputs  the ATA IDENTIFY (PACKET) DEVICE response in hex. The default action (i.e.
              without any '-H' options) is to output the response in hex, grouped in 16 bit words
              (i.e.  the  ATA standard's preference).  When given once, the response is output in
              ASCII hex bytes (i.e. the SCSI  standard's  preference).  When  given  twice  (i.e.
              '-HH')  the  output is in hex, grouped in 16 bit words, the same as the default but
              without a header. When given thrice (i.e. '-HHH') the output is in hex, grouped  in
              16 bit words, in a format that is acceptable for 'hdparm --Istdin' to process.

       -i, --indent
              outputs  the  World  Wide  Name  (WWN) of the device. This should be a NAA-5 64 bit
              number.  It  is  output  in  hex  prefixed  with  "0x".  If  not   available   then
              "0x0000000000000000"  is  output.  The equivalent for a SCSI disk (i.e. its logical
              unit name) can be found with "sg_vpd -ii".

       -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. The larger cdb size is needed
              for 48 bit LBA addressing of ATA devices. On the other hand  some  SCSI  transports
              cannot convey SCSI commands longer than 12 bytes.

       -p, --packet
              send an ATA IDENTIFY PACKET DEVICE command (via the SATL). The default action is to
              send an ATA IDENTIFY DEVICE command.

       -r, --raw
              output the ATA IDENTIFY (PACKET) DEVICE response in binary. The  output  should  be
              piped to a file or another utility when this option is used.  The binary is sent to
              stdout, and errors are sent to stderr.

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

       -V, --version
              print out version string

NOTES

       Since the response to the IDENTIFY (PACKET) DEVICE  command  is  very  important  for  the
       correct  use of an ATA(PI) device (and is typically the first command sent), a SATL should
       provide an ATA Information VPD page which contains the similar information.

       The SCSI ATA PASS-THROUGH (12) command's opcode is 0xa1 and it clashes with the MMC  set's
       BLANK  command used by cd/dvd writers. So a SATL in front of an ATAPI device that uses MMC
       (i.e. has peripheral device type 5) probably should treat opcode 0xa1 as a  BLANK  command
       and send it through to the cd/dvd drive. The ATA PASS-THROUGH (16) command's opcode (0x85)
       does not clash with anything so it is a better choice.

       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"). Prior to lk 2.6.29 USB mass storage
       limited sense data to 18 bytes which made the --ck_cond option yield  strange  (truncated)
       results.

EXIT STATUS

       The  exit  status  of  sg_sat_identify  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 © 2006-2011 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_vpd(sg3_utils), sg_inq(sg3_utils), sdparm(sdparm), hdparm(hdparm)