Product specifications

Infortrend
A-6
Supported memory
type
SDRAM or DDR memory for enhanced
performance
Fast Page Memory with Parity for enhanced data
security
Read-ahead
operation
Intelligent and dynamic read-ahead operation for
processing sequential data requests
Multi-threaded
operation
Yes
Scatter / Gather
Supported
I/O sorting
Supported. Optimized I/O sorting for enhanced
performance.
Adaptive Write-
back/Write-through
switching
For a better performance when handling large
sequential writes, firmware temporarily disables
write-cache and the synchronized cache
operation between partner controllers if operating
with dual-active RAID controllers. Firmware
automatically restores the write-back mode when
later encountering random and small writes.
Periodic Cache
Flush
Firmware can be configured to flush the cached
contents in memory at every preset interval:
1. If data integrity is of the concern, e.g.,
the lack of a battery backup protection.
2. Cache flush on preset intervals to avoid
the latency when cache memory is full
due to write delays.
Opt. for
Sequential I/Os
Opt.
for
Rando
m
I/Os
RAID0
128 32
RAID1
128 32
RAID3
16 4
RAID5
128 32
Variable stripe size
RAID6
128 32
Caching
Optimization
• Cache buffer sorting prior to cache flush operation
• Gathering of writes during flush operation to minimize the number
of I/Os required for parity update
• Elevator sorting and gathering of drive I/Os
• Multiple concurrent drive I/Os (tagged commands)
• Intelligent, predictive multi-threaded read-aheads
• Multiple, concurrent host I/O threads (host command queuing)