Infortrend RAID Controller Manual

B-6
Automatic Failover Yes for all PowerPC controllers (user's interaction
necessary)
Automatic Failback Yes for all PowerPC controllers (user's interaction
necessary)
Fibre channel redundant Supported.
controller
Controller Hot-Swap � No need to shut down the failed controller before
replacing the failed controller. (Customer's design-in
hot-swap mechanism necessary)
� Support on-line hot-swap of the failed controller.
There is no need to reset or shutdown the failed
controller. One controller can be pulled out during
active I/Os to simulate the destructive controller failure.
(Customer's design-in hot-swap mechanism
necessary)
Redundant Controller SentinelRAID: SCSI; RCC Reset signals built-in
Communication channel EonRAID: Fibre channel(s); RCC cable necessary
Redundant Controller
Communication over Dedicated loops or distribution over drive loops selectable
Fibre loops
No Single-point-of- Supported.
failure
Automatic engagement Supported in PowerPC series
of replacement
controller
Dynamic cache memory Yes. Cache memory is dynamically allocated, not fixed.
allocation
Environment
Supported. SAF-TE, S.E.S., ISEMS (I
management
2C interface); and
on-board controller voltage/temp monitor are all supported
in both single and redundant controller mode. In the event
of controller failure, serves can be taken over by the
existing controller.
Cache battery backup Supported. Battery backup solutions for cache memory
are supported in both single controller and redundant
modes.
Load sharing Supported. Workload can be flexibly divided between
different controllers by assigning logical configurations of
User configurable
channel mode
Require a special
Firmware for redundant
controller?
Redundant Controller
rolling firmware upgrade
drives (LDs/LVs) to different controllers.
Supported. Channel modes configurable (SCSI or Fibre)
as HOST or DRIVE in both single controller and redundant
controller mode.
No. All firmware and all Infortrend external RAID
controllers support redundant controller function.
Firmware upgrade can be downloaded to the primary
controller and then be adopted by both controllers, without
interrupting host I/O.
Infortrend