SCSI Environmental Services driver
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.
It is only necessary to explicitly configure one
device; data structures are dynamically
allocated as devices are found on the SCSI bus.
A separate option, SES_ENABLE_PASSTHROUGH
be specified to allow the
perform functions on devices of other classes that claim to also support
The following ioctl(2)
calls apply to
devices. They are defined in the header
- Used to find out how many
are driven by this particular device instance.
- 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.
- Get the overall enclosure status.
- Set the overall enclosure status.
- Get the status of a particular object.
- Set the status of a particular object.
- 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
- Initialize the enclosure.
The files contained in
show simple mechanisms for how to use these interfaces, as well as a very
stupid simple monitoring daemon.
- The Nth
When the kernel is configured with DEBUG enabled, the first open to an SES
device will spit out overall enclosure parameters to the console.
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.