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Overview
Delivering unprecedented performance and reliability the 3U Comet
SCSI 16 RAID subsystems integrate Caen's highly acclaimed SCSI-to-SCSI
RAID controllers with a wide range of 16 hot-swappable, high-performance,
industry-standard SCSI-320 drives in a single, uniquely designed,
highly accessible storage enclosure that is able to endure the extreme
physical stresses placed on storage subsystems today.
Two models, the Comet SCSI 16-4 and the Comet SCSI 16-6, are both
featured with two SCSI 320 host channels, and SCSI-320 drive channels.
The Comet SCSI 16-6 model additionally has two SCSI-320 expansion
channels. Both models have an embedded SCSI-320 controller that
ensures superior performance, extreme reliability and exceptional
data availability.
Equipped with two fully redundant, hot-swappable cooling fan modules
and two fully redundant, hot-swappable power supply units, the uniquely
designed 19-inch rack mountable enclosure has been customized to
perform in the most rigorous storage environments where data availability
and durability is an imperative.
Architecture
Based on architecture designed for the most demanding applications,
the subsystem is capable of very high levels of performance. Its
64-bit separate-bus backbone is built around dedicated XOR engines
running at twice the data bus speed. The calculation of parity and
distribution of data can be optimized with the free association
between individual logical arrays and different optimization modes.
High Performance
Featuring a 64-bit 133MHz memory bus, the unparalleled bandwidth
makes the subsystem's high data throughput more than sufficient
for small-to-medium sized servers or workstations. Data can be distributed
at the burst rate up to 1066MB/sec. The dual independent PCI bus
design virtually eliminates all imminent bottlenecks on IO traffic,
providing sufficient throughput for a wide range of applications
on workstations, Windows 2000/NT/XP, Linux, or Unix-based servers.
These applications include disk-to-disk backup, Video on Demand,
CCTV, stream editing and others.
Intelligent Drive Handling
Media Scan is an innovative Intelligent Drive Handling function
that can be used for data retrieval from degraded or damaged hard
drives. If two bad blocks occur on two member drives of an array,
the integrity of the stored data will be endangered.
Intelligent Drive Handling capabilities can be used to retrieve
data from the damaged sectors. Media Scan is able to handle low
quality drives in both the degraded mode and during the rebuild
process. Other intelligent drive management features, which provide
further data security, include the transparent resetting of non-responsive
hard drives, Power-failure management and bad drive handling during
LD expansion.
Auto Switch Cache Policy and Auto Shutdown
When a RAID controller detects conditions that exceed the preset
thresholds, the following actions will be initiated to protect the
hardware:
1. Cached data will be automatically flushed and the array's caching
mode will be switched from write-back to write-through
2. If the conditions persist for a preset period of time, auto shutdown
of the controller will commence.
All the thresholds associated with this mechanism are user configurable
and, once a subsystem manager restores the normal operating conditions,
the caching mode will change back from the write-through mode to
the write-back mode.
Specifications
RAID Controllers
 State-of-the-art
400MHz RISC processor with 256KB embedded L2 cache
Caen
Proprietary ASIC with XOR engine and ECC inside
Standard
128MB 1GB cache memory in one SDRAM with optional BBU.
LCD
panel interface
System
Fan speed/Voltage/Temperature self-monitoring
One
RS-232C DB9 serial port for text mode management
One
10/100M Ethernet Port . 32KB NVRAM with RTC (Real Time Clock) .
Beeper
RAID Operation
RAID
level 0, 1 (0+1), 3, 5, 10, 30, 50, NRAID and JBOD
Multiple
RAID selection
Hot-spare
drive operation
Drive
hot-swapping
Automatic
background rebuild
Online
drive expansion
Intelligent
Drive Handling
Host Interfaces
Two SCSI-320 Host Channels
Management Software
System
monitoring via out-of-band Ethernet
RAIDWatch
manager software for all major platforms via an Ethernet port .
Firmware-embedded manager via RS-232C (Audio Jack) (platform independent)
External Connections
Two
VHDCI Host SCSI connectors
Two
VHDCI Expansion SCSI connectors (6 channel models only)
One
RS-232C DB9 serial port connector (38400, n, 8,1) . One RJ45 Ethernet
port
Chassis Dimensions
Without Handles: 446.2W x 131H x 500Dmm
With Handles: 485W x 131H x 532Dmm
Download
the printable PDF from our FTP site!
Please contact our sales team at sales@caeneng.com or our service department at support@caeneng.com if you want to find out more!
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