Provided by: sg3-utils_1.40-0ubuntu1_amd64 bug

NAME

       sg_sat_identify - send ATA IDENTIFY DEVICE command via SCSI to ATA Translation (SAT) layer

SYNOPSIS

       sg_sat_identify   [--ck_cond]   [--extend]  [--help]  [--hex]  [--indent]  [--len={16|12}]
       [--packet] [--raw] [--readonly] [--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.
              '-HHHH' simply outputs hex data bytes, space separated, 16 per line.

       -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.

       -R, --readonly
              open the DEVICE read-only (e.g. in Unix with the O_RDONLY flag).  The default is to
              open it read-write.

       -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.

       Prior  to  Linux  kernel 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 Douglas Gilbert

REPORTING BUGS

       Report bugs to <dgilbert at interlog dot com>.

COPYRIGHT

       Copyright © 2006-2014 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)