Compaq Infortrend Manuale Utente
Firmware Functionality Specifications
B-7
Redundant Controller
Communication over
Fibre loops
Communication over
Fibre loops
Dedicated loops or distribution over drive loops selectable
No Single-point-of-
failure
failure
Supported.
Automatic engagement
of replacement
controller
of replacement
controller
Supported in PowerPC series
Dynamic cache memory
allocation
allocation
Yes. Cache memory is dynamically allocated, not fixed.
Environment
management
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, serves can be taken over by the
existing controller.
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.
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
drives (LDs/LVs) to different controllers.
different controllers by assigning logical configurations of
drives (LDs/LVs) to different controllers.
User configurable
channel mode
channel mode
Supported. Channel modes configurable (SCSI or Fibre)
as HOST or DRIVE in both single controller and redundant
controller mode.
as HOST or DRIVE in both single controller and redundant
controller mode.
Require a special
Firmware for redundant
controller?
Firmware for redundant
controller?
No. All firmware and all Infortrend external RAID
controllers support redundant controller function.
controllers support redundant controller function.
Redundant Controller
rolling firmware upgrade
rolling firmware upgrade
Firmware upgrade can be downloaded to the primary
controller and then be adopted by both controllers, without
interrupting host I/O.
controller and then be adopted by both controllers, without
interrupting host I/O.
Redundant Controller
firmware
synchronization
firmware
synchronization
In the event of controller failure, a replacement controller
running a different version of firmware can be combined to
restore a redundant system with a failed controller.
Different firmware versions can be auto-synchronized
later.
running a different version of firmware can be combined to
restore a redundant system with a failed controller.
Different firmware versions can be auto-synchronized
later.
Data Safety:
Regenerate Parity of
logical drives
logical drives
Supported. Can be performed every so often by user to
ensure that bad sectors do not cause data loss in the
event of drive failure.
ensure that bad sectors do not cause data loss in the
event of drive failure.
Bad block auto-
reassignment
reassignment
Supported. Automatic reassignment of bad block
Battery backup for
cache memory
cache memory
Supported. The battery backup solutions provide long-
lasting battery support to the cache memory when power
failure occurs. The unwritten data in the cache memory
can be committed to drive media when power is restored.
lasting battery support to the cache memory when power
failure occurs. The unwritten data in the cache memory
can be committed to drive media when power is restored.
Verification on Normal
Writes
Writes
Supported. Performs read-after-write during normal write
processes to ensure data is properly written to drives.
processes to ensure data is properly written to drives.
Verification on Rebuild
Writes
Writes
Supported. Performs read-after-write during rebuild write
to ensure data is properly written to drives.
to ensure data is properly written to drives.