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SentinalRAID 150F - Ultra3 SCSI to SCSI
External RAID Controller
Overview
The SentinelRAID 150F is designed for today's demanding I/O
applications with advanced RAID operations featuring four
Ultra3 SCSI channels. Its exceptionally high performance derives
from the combination of a 64-bit RISC PowerPC 750 CPU and
Infortrend's sophisticated RAID ASIC. I/Os are rapidly processed
and distributed to array hard drives. Data is transferred
between the host and the drives via a high-speed 64-bit data
path at a burst rate of 1056MB/second. The result is a controller
which excels in applications that require both high sustained
data rates and fast I/O turnaround.
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Features
High Flexibility
Each SCSI channel can be defined as either a drive channel or a
host channel. This allows users to connect multiple host systems
through independent channels. Background firmware download and automated
rolling upgrade (in redundant mode) are also supported.
High Data Availability
With a multitude of RAID functions, the SentinelRAID 150F gives
users both the highest data availability and security. SentinelRAID's
capabilities include: automatic drive failure detection, background
rebuilding, and bad sector reassignment. When the controller detects
a hard drive failure in a RAID 1, 3, or 5 logical drive, the disk
array will instantly replace the failed disk with a hot-spare drive.
Data is reconstructed into the hot-spare drive, while the host remains
uninterrupted. In the absence of a hot-spare drive, users can hot-replace
the failed drive with a new one and initiate an automatic rebuild.
Advanced Configuration Options
RAID level stripe size is configurable on a per logical drive basis.
Caching mode is automatically switched to a conservative state upon
the discovery of critical conditions.
Active-Active Redundancy
The controller supports active-active redundancy and the controller
failover/failback is totally transparent to host. Array workload
can be flexibly assigned to either controller on a per logical unit
basis while cached data is constantly synchronized over the dedicated
communications channel. Different caching mode optimization applies
to different logical drives for the best adaptation to I/O characteristics.
Bad Sector Management
SentinelRAID detects bad sectors on SCSI drives during disk reads
or writes. It will recover the data from parity fault and perform
bad sector reassignments.
A manual Scrub function helps to discover media errors on drives.
Data is then safely reconstructed onto the healthy sectors.
Battery Backup
Infortrend's battery backup option protects write-back cache data
from sudden power interruptions. If system power is lost before
the controller completes a cache write flush operation, the battery
supplies auxiliary power (see specifications for details) to the
controller's DRAM until system power is restored and the write cache
is flushed.
Full technical specifications are detailed on the pdf.
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