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Highlights
 Two 320MB/second
SCSI (SCSI-320) host channels each interfaced through two
dual-stacked VHDCI connectors
Supports 3.5"
profile, SATA II, 3Gbps interface disk drives
Convertible as
either a tower or desktop subsystem
Scalability to
12TB by four cascaded subsystems. In the desktop configuration
four subsystems can be stacked for capacity expansion
Intelligent Drive
Handling: Manages bad blocks during rebuild and Media Scan
function for normal data maintenance
Scheduled Maintenance:
Media Scan can be scheduled starting at a specified start
time and repeated at regularly timed intervals. The start
time and time intervals can be manually selected.
Variable rebuild
and maintenance task priorities
Auto Cache Flush
and Auto Shutdown on critical conditions
Overview
The new, highly versatile Comet 8 Cube RAID subsystems are
the latest of Caen's highly acclaimed SATA RAID products.
The Cube subsystem can conveniently be configured as either
a desktop or a tower subsystem and its modular architecture
is designed to provide the same protection as offered by an
enterprise-class solution.
Each of the two 320MB/second SCSI host channels is connected
to two separate, dual-stack connectors. The VHDCI connectors
can either be connected to a host computer or cascaded to
a second Comet 8 Cube subsystem. A maximum of four Cube subsystems
can be cascaded together. In the desktop configuration four
subsystems can be stacked on top of each other.
The eight drive bays receive 3.0Gbps SATA II disk drives
and are routed through a drive-plane board to the RAID controller
unit in the back. SATA-to-PATA dongle kits are also available,
enabling a user to install PATA drives into the subsystem
for an economic solution.
With two redundant, single-fan cooling modules, two redundant
250W power supply unit (PSU) modules, and an optional cache
battery backup unit (BBU), the Comet 8 Cube subsystems operate
with extreme reliability.
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Management
A variety of management interfaces are available. The array can
be accessed through the LCD keypad panel, RS-232C terminal, telnet,
or remotely through the Java-based RAIDWatch manager. Users are
constantly aware and automatically notified of array status using
any or all of the following notification methods: Email, Fax, LAN
broadcast, SNMP Traps, MSN messaging, ICQ, SMS short messages, and
the configuration utility screen.
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 settings.
Specifications
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 a burst rate up to 1066MBps. The dual-independent PCI bus design
virtually eliminates all imminent bottlenecks on I/O traffic, providing
sufficient throughput for a wide range of applications on workstations,
Windows 2000/2003/XP-, Linux-, or Unix-based servers. These applications
include disk-to-disk backup, video-on-demand, CCTV, stream editing,
and others.
Intelligent Drive Handling
If bad blocks occur on two member drives of an array, the integrity
of the stored data is endangered. Media Scan, Caen’s innovative
intelligent drive handling function, repairs and retrieves data
from the affected or adjacent sectors. Media Scan handles low quality
drives in both the degraded mode and during the rebuild process.
For additional data security, other intelligent drive management
features 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 past 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 write-through to write-back
mode.
RAID Controller
RISC processor with
256KB embedded L2 cache
Caen Proprietary ASIC133
XOR engine and ECC inside
Standard 128MB cache
memory in one SDRAM protected by optional battery backup
LCD keypad panel
System voltage/temperature
self-monitoring
One (1) RS-232C (audio
jack) serial port for text mode management
One 10/100 BaseT Ethernet
port
32KB NVRAM with RTC
(Real-Time Clock)
Beeper
RAID Operation
RAID level 0, 1 (0+1),
3, 5, 10, 30, 50, JBOD, and NRAID
Multiple RAID selection
Dedicated and global
hot-spare drives
Drive hot-swapping
Automatic background
rebuild
Online expansion by
adding drives, or replacing members with larger drives
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) that is platform independent
Event notifications
via an independent Configuration Client utility
External Connections
Four dual-stacked VHDCI
connectors SCSI connection
One RS-232C (audio jack)
serial port connector (38400, n, 8,1)
One RJ-45 10/100BaseT
Ethernet port
Enclosure Dimensions 5.43W x 14.25H x 12.87D in.
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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