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SG_SAT_PHY_EVENT(8)                         SG3_UTILS                         SG_SAT_PHY_EVENT(8)

NAME
       sg_sat_phy_event  -  use  ATA  READ LOG EXT via a SAT pass-through to fetch SATA phy event
       counters

SYNOPSIS
       sg_sat_phy_event  [--ck_cond]  [--extend]  [--help]  [--hex]  [--ignore]   [--len={16|12}]
       [--raw] [--reset] [--verbose] [--version] DEVICE

DESCRIPTION
       This  utility sends an ATA READ LOG EXT with the log page ("address") set to 11h to DEVICE
       and outputs the response. Log page 11h is defined in the SATA 2.5  standard  and  contains
       phy  event  counters. Rather than send this command directly to the DEVICE, 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 ex-
       ternal enclosure.

       The SAT standard (SAT ANSI INCITS 431-2007, prior draft: sat-r09.pdf at  www.t10.org)  de-
       fines 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 stan-
       dard:  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 de-
              scriptor 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  DE-
              VICE if given.

       -H, --hex
              outputs  the ATA READ LOG EXT 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 out-
              put  is  in  hex,  grouped  in  16 bit words, the same as the default but without a
              header.

       -i, --ignore
              usually the phy counter identifier names are decoded. When this  option  is  given,
              the numeric value of the identifier is output, the vendor flag, the data length (in
              bytes) and the corresponding value.

       -l, --len={16|12}
              this is the length of the SCSI cdb used for the ATA PASS-THROUGH commands.  The ar-
              gument 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.

       -r, --raw
              output  the  ATA  READ  LOG EXT 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, --reset
              reset the counters after the current values are returned, decoded and displayed.

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

       -V, --version
              print out version string

NOTES
       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" de-
       vice 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 Douglas Gilbert

REPORTING BUGS
       Report bugs to <dgilbert at interlog dot com>.

COPYRIGHT
       Copyright (C) 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_sat_identify,sg_sat_read_gplog(sg3_utils),    smp_rep_phy_err_log(smp_utils),sdparm(sd-
       parm),hdparm(hdparm)

sg3_utils-1.46                              July 2020                         SG_SAT_PHY_EVENT(8)

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