Infortrend RAID Controller Manual

9-14
With firmware release 3.14 and above, redundant controllers can
communicate through Fibre channels. At this stage of development,
this feature is supported with the EonRAID series (6-channel). If RCC
(Redundant Controller Communications) over Fibre is preferred, some
failover signals must be connected externally using the supplied 4pin
RCC cables.
Two schemes are available for controller communications over Fibre
loops. Hardware configuration should be completed before firmware
setting.
1. Dedicated Communications loops: One or two Fibre
channels (designated as host channel) can be converted into
the dedicated communications path for synchronizing cache
and configuration data. Select from the main menu "View
and Edit SCSI channels," and configure the selected FC
channels into "RCCOM (Redundant Controller
Communication)" mode. To guarantee data path
redundancy, you may use two channels as the dedicated
RCC loops. The dedicated channels should not be attached
with any other devices.
2. Communications traffic distributed over all drive loops:
Select all drive loops and configure them as "Drive+RCCOM
(Drive Loops and Redundant Controller Communications)."
The communications traffic between the two controllers will
be automatically distributed over all drive loops.
1. As displayed above, channel(s) selected as the
communications paths will be displayed as
"channel number (C: connected)" or "channel
number (D: disconnected)." If channels configured
in a dual-loop are selected, channel status will be
displayed as "channel number (pair loop; C or D)."
2. If any communications loop should fail, the intercontroller
traffic will be automatically shifted to over
the remaining RCC loop(s).
Here is an example of Fibre-Fibre RCC configuration:
Controller
Daughterboard Expansion
Controller Presence Detect
EonRAID 2000-6 x 2
2 channels with 9282FA
Signals connected through 4-pin RCC cables
Infortrend