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 contains 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  trans-
       port  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 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 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) 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").

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 PUR-
       POSE.

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)