Product specifications

Infortrend
A-8
Synchronized cache
Supported. Through one or multiple, dedicated
synchronizing channels on a common backplane
or external cabling. Synchronized cache over
SCSI channels, Fibre loops, or SATA channels is
supported.
Synchronized cache can be disabled when using
write-through mode in a redundant controller
configuration to prevent performance trade-offs.
Write-back cache
enabled in redundant
controller mode
Yes, with synchronized cache connection
between controllers.
Automatic failover
Yes (user's interaction necessary)
Automatic failback
Yes (user's interaction necessary)
Controller hot-swap
 No need to shut down the failed controller
before replacing the failed controller.
 Support online 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)
Parity synchronization
in redundant controller
write-back mode to
avoid write-hole
Supported.
Redundant controller
communication over
Fibre loops
Dedicated loops or distribution over drive loops
selectable
No single-point-of-
failure
Supported.
Automatic
engagement of
replacement controller
Supported.
Dynamic cache
memory allocation
Yes. Cache memory is dynamically allocated,
not fixed.
Environment
management
Supported. SAF-TE, S.E.S., ISEMS (I
2
C
interface); and on-board controller voltage/temp
monitor are all supported in both single and
redundant controller mode. In the event of
controller failure, services can be taken over by
the surviving controller.
Cache battery backup
Supported. Battery backup modules support
cached data during a power outage in both single
controller and redundant controller modes.