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       sg_senddiag     [-doff]     [-e]     [-h]    [-l]    [-pf]
       [-s=<self_test_code>] [-t] [-uoff] [-V] [-?]  <sg_device>


       This utility sends a SEND DIAGNOSTIC SCSI command  to  the
       given  device.  In the case of '-l' option it then sends a
       RECEIVE DIAGNOSTIC SCSI  command  to  fetch  the  response
       (i.e.  the  page  numbers  of supported diagnostic pages).
       This utility is mainly used to make  the  device  do  self

       -doff  set  the  Device  Offline  (DevOfl) bit (default is
              clear). Only significant when '-t'  option  is  set
              for  the  default  self  test.  In  this  sense the
              'Device' is a target (with  all  contained  logical
              units potentially impacted).

       -e     outputs  the  time  taken for the previous extended
              self test. The duration is given  in  seconds  (and
              minutes  in  parentheses).  This figure is obtained
              from mode page 0xa (control page).

       -h     outputs response from  RECEIVE  DIAGNOSTIC  is  hex
              rather than decode it.

       -l     lists  the  names of all diagnostic pages supported
              by this device.  The request is  sent  via  a  SEND
              DIAGNOSTIC command and the response is fetched by a
              RECEIVE DIAGNOSTIC command.

       -pf    set Page Format (PF) bit. By default  it  is  clear
              (i.e. 0).

              the  default  value is 0 which is inactive. A value
              of 1  selects  a  background  short  self  test;  2
              selects  a background extended self test; 5 selects
              a foreground short self test;  6  selects  a  fore­
              ground  extended  test.  A  value of 4 will abort a
              (background) self test that is  in  progress.  This
              option is mutually exclusive with default self test
              (i.e. '-t').

       -t     sets the _default_ Self  Test  (SelfTest)  bit.  By
              default  this  is clear (0).  The '-s=<num>' option
              should not be active  together  with  this  option.
              Both the '-doff' and/or '-uoff' options can be used
              with this option.

       -uoff  set the  Unit  Offline  (DevOfl)  bit  (default  is
              clear).  Only  significant  when '-t' option is set

       ground  self  test  codes  are  placed  in  the 'self test
       results' log page (see sg_logs). The SCSI command  timeout
       for  this  utility  is set to 40 minutes to allow for slow
       foreground extended self tests.

       If the given device is a disk then no file systems  resid­
       ing  on  that  disk  should be mounted during a foreground
       self test. The reason is  that  other  SCSI  commands  may
       become queued behind the foreground self test and timeout.

       In the 2.4 series of Linux kernels the given  device  must
       be  a  SCSI  generic  (sg) device. In the 2.5 series block
       devices (e.g. disks and SCSI DVDs) can also be  specified.
       For example 'sg_senddiag -t /dev/sda' will work in the 2.5
       series kernels.


       Written by Doug Gilbert


       Report bugs to <dgilbert@interlog.com>.


       Copyright © 2003 Douglas Gilbert
       This software is distributed  under  the  GPL  version  2.
       There is NO warranty; not even for MERCHANTABILITY or FIT­


       smartmontools(see net), sg_logs(sg3_utils)

sg3_utils-1.04              April 2003             SG_SENDDIAG(8)

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