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Galaxy 55 User Guide
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2.5.4 Installation Procedure
Caution Check that the Ops panel keys are included with the module. If they cannot be accounted for they may
have been discarded with the packaging.
Install the module by sliding into rear Bay 3/1, ensuring the module has docked with the connector and the retention
clip has engaged with the chassis.
2.5.5 SES Function
The SCSI Enclosure Services (SES) interface provides the FC-AL enclosure with an ANSI SCSI-3 SES standard
compliant enclosure management interface. This specification is extremely flexible and provides for a control and
status interface to a wide range of element types (an element could be a PSU, Fan or UPS etc.
It is important to recognize that the Galaxy 55 product handles all management requirements of the enclosure’s
power, cooling and temperature, no control action is required by a host processor. Status information is available to
allow effective use of the internal conditions for decision making and user interfacing.
Management of the disk devices are the responsibility of the Host processor (or RAID controller) as it has the
capability of detecting device miss-operation. The SES interface provides a path to indicate to the user (through
carrier LEDs) which device is causing the problem.
The device element status fields also provide the necessary mapping of device bays to device FC-AL physical
address (AL_PA).
Important Please refer to the full SES Interface specification document (IFSALSES) for complete definition
of the SES protocol supported.
Please refer to the ANSI SCSI-3 SES specification and Drive manufacturers’ FC-AL interface specifications for
details of interfacing to the ESI processor through the two activated devices within the Galaxy 55 enclosure.
• SFF 8067 Interface from 2 Drive bays (1/3 and 4/3) communicate with ESI processor.
– Provides 2 alternative paths to enclosure data.
– ESI processor housed in Ops Panel module
– Polled system
– No timed disconnect
– No Asynch event reporting
Figure 2–9 ESI/Ops Panel Installation