NAME

       ses — SCSI Environmental Services driver

SYNOPSIS

       device ses

DESCRIPTION

       The  ses  driver  provides  support  for  all  SCSI  devices of the environmental services class that are
       attached to the system through a supported SCSI Host Adapter, as well  as  emulated  support  for  SAF-TE
       (SCSI  Accessible  Fault  Tolerant Enclosures).  The environmental services class generally are enclosure
       devices that provide environmental information such as number of power supplies (and state), temperature,
       device slots, and so on.

       A SCSI Host adapter must also be separately configured  into  the  system  before  a  SCSI  Environmental
       Services device can be configured.

KERNEL CONFIGURATION

       It is only necessary to explicitly configure one ses device; data structures are dynamically allocated as
       devices are found on the SCSI bus.

       A  separate option, SES_ENABLE_PASSTHROUGH, may be specified to allow the ses driver to perform functions
       on devices of other classes that claim to also support ses functionality.

IOCTLS

       The  following  ioctl(2)  calls  apply  to  ses  devices.   They  are  defined   in   the   header   file
       <cam/scsi/scsi_ses.h> (q.v.).

       SESIOC_GETNOBJ     Used to find out how many ses objects are driven by this particular device instance.

       SESIOC_GETOBJMAP   Read,  from  the kernel, an array of SES objects which contains the object identifier,
                          which subenclosure it is in, and the ses type of the object.

       SESIOC_GETENCSTAT  Get the overall enclosure status.

       SESIOC_SETENCSTAT  Set the overall enclosure status.

       SESIOC_GETOBJSTAT  Get the status of a particular object.

       SESIOC_SETOBJSTAT  Set the status of a particular object.

       SESIOC_GETTEXT     Get the associated help text for an object (not yet implemented).  ses  devices  often
                          have  descriptive  text  for  an object which can tell you things like location (e.g.,
                          "left power supply").

       SESIOC_INIT        Initialize the enclosure.

EXAMPLE USAGE

       The files contained in <usr/share/examples/ses> show simple mechanisms for how to use  these  interfaces,
       as well as a very stupid simple monitoring daemon.

FILES

       /dev/sesN      The Nth SES device.

DIAGNOSTICS

       When  the  kernel is configured with DEBUG enabled, the first open to an SES device will spit out overall
       enclosure parameters to the console.

SEE ALSO

       sesutil(8)

HISTORY

       The ses driver was written for the CAM SCSI subsystem by Matthew Jacob.  This is a functional  equivalent
       of a similar driver available in Solaris, Release 7.

Debian                                         September 05, 2015                                         SES(4)