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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 coun‐
       ters

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 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  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  ef‐
              fect when --len=12.

       -h, --help
              outputs  the usage message summarizing command line options then exits. Ignores DEVICE
              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 output 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  argu‐
              ment  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  con‐
              vey 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" 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 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 MER‐
       CHANTABILITY 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)