Provided by: sg3-utils_1.46-3ubuntu2.1_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] [--ident] [--len=CLEN] [--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-4 revision 5
       added a SCSI "ATA PASS-THROUGH(32)" command. SAT-2 and SAT-3 are now also standards: SAT-2
       ANSI  INCITS  465-2010  and  SAT-3  ANSI  INCITS  517-2015  .  The  SAT-4  project is near
       standardization and the most recent draft is sat4r06.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, --ident
              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=CLEN
              CLEN  this  is  the  length  of the SCSI cdb used for the ATA PASS-THROUGH command.
              CLEN can either be 12, 16 or 32. The default is 16. The larger cdb sizes are needed
              for  48  bit LBA addressing of ATA devices. The ATA Auxiliary and ICC registers are
              only conveyed with the 32 byte cdb variant.

       -p, --packet
              send an ATA IDENTIFY PACKET DEVICE command (via the SATL). The default action is to
              send an ATA IDENTIFY DEVICE command. Note that the ATAPI specification by T13 (i.e.
              the PACKET interface) is now obsolete.

       -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.

EXAMPLES

       These examples use Linux device names and a Linux  utility  called  hdparm.  For  suitable
       device names in other supported Operating Systems see the sg3_utils(8) man page.

       In this example /dev/sdb is a SATA 2.5" disk connected via a USB (type C connector) dongle
       that implements the UAS (USB attached SCSI) protocol (also known as UASP). UAS is  a  vast
       improvement over the USB mass storage class.

           # sg_sat_identify /dev/sdb
       Response for IDENTIFY DEVICE ATA command:
        00   0c5a 3fff c837 0010 0000 0000 003f 0000  .Z ?. .7 .. .. .. .? ..
        ....

       The  hexadecimal ASCII (with plain ASCII to the right) output is abridged to a single line
       (i.e. the first 16 bytes (or 8 words)). Now to decode some of that ATA Identify  response.
       First sg_inq can decode a few strings:

           # sg_sat_identify -HHHH /dev/sdb | sg_inq --ata -I -
       ATA device: model, serial number and firmware revision:
         ST9500420AS     5VJCE6R7 0002SDM1

       For a lot more details, the hdparm utility is a good choice:

           # sg_sat_identify -HHH /dev/sdb | hdparm --Istdin
       ATA device, with non-removable media
               Model Number:       ST9500420AS
               Serial Number:      5VJCE6R7
               Firmware Revision:  0002SDM1
               Transport:          Serial
       Standards:
        ....

       There  are  about  80  more  lines  of details decoded by hdparm in this case.  Notice the
       difference in the number of "H" options: three give an unadorned hex  output  arranged  in
       (little  endian)  words  (i.e.  16 bits each) while four "H" options give an unadorned hex
       output in bytes (i.e. 8 bits each).

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 © 2006-2020 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)