man > sg_sat_phy_event(8)

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)