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Chapter 4 RAID Configurations
The I/O circuit board has two SFF optical transceivers supporting
shortwave multimode fibre on the host side and a 90-pin controlled
impedance (50 Ohm) connector on the device side. An HSSDC
connector with repeaters on the expansion loop provides for a copper
connection between one of the device channels and an expansion
module. Port bypass circuitry on the I/O circuit board enables quadplex
operation on a second host loop. The I/O board has seven LEDs to
indicate subsystem status.
RS232 Serial Port
The 3-pin, RS232 Serial Port is located on the RAID controller and
provides VT100 terminal emulation capabilities. It can be used to
configure and manage the storage array. This RS232 port applicable
when attaching to operating systems that are not supported by Acer's
management software, or for using a CLI to create scripts.
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