RAID Array 3000 Controller Shelf
Figure 1–3 shows the major components in the controller shelf. Its characteristics are outlined below.
∙An easily removable, two channel, resident RAID Array controller and an ad- jacent empty slot for a second (redundant) controller (optional)
∙There are two 68-pin VHDCI female SCSI connectors on the front panel of the device I/O assembly which interconnect the RAID controller to the SCSI buses in each storage shelf. SCSI connections to multiple Device Expansion Shelves are made using Trilink adapters
∙The front of the shelf contains two LEDs that monitor the status of the shelf and the shelf dc power supplies
∙The front of the shelf has a toggle switch that allows the operator to disable the shelf alarm during an error condition
∙The shelf host I/O assemblies each contain two 68-pin VHDCI female SCSI connectors that interconnect the host systems to the RAID controller
∙Each host I/O assembly contain a 9-pin serial port connector (for controller configuration) and a 9-pin UPS monitor connector
∙Two dc power supplies (one redundant) that power the shelf components
∙The shelf contains two high-speed, plug-in blowers for shelf cooling
Figure 1–3 Controller Shelf Major Components
B low ers
D C P ow er | R AID |
Su pp lie s | |
| C o ntroller B la nk |
| Pa ne l |
Host 0 | H o st 1 | D ev ice I /O |
I/O M od ule | ||
| I/ O Mo du le | M od ule |
S H
