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SG_SAT_PHY_EVENT(8)                SG3_UTILS               SG_SAT_PHY_EVENT(8)



NAME
       sg_sat_phy_event  -  Sends  an ATA READ LOG EXT command via a SAT pass through to fetch log page 11h which con-
       tains 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 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.

       The SATL may be in an operating system driver, in host bus adapter firmware or in some external enclosure.

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 com-
              mand 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 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 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.

       -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) proba-
       bly 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").

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 (C) 2006-2007 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(sg3_utils), smp_rep_phy_err_log(smp_utils), sdparm(sdparm), hdparm(hdparm)



sg3_utils-1.26                   December 2007             SG_SAT_PHY_EVENT(8)