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Overview
Designed using Caen’s next-generation custom ASIC 266 as a
dedicated XOR engine, the Comet SATA II eU provides ample
margins for flexible load-balancing and multi-pathing algorithms.
Boasting a 2GB internal system bandwidth, the dedicated ASIC architecture
frees the PowerPC CPU of XOR computing load and features abundant
throughput sufficient for the subsystem's various data protection
procedures with minimum disturbance to host access.
Caen’s RAID functionality is unmatched in the industry in
terms of its wide variety of array configuration, maintenance, and
monitoring capabilities. The SCSI-to-SATA series provides IT professionals
with versatile options to meet their needs. The subsystem provides
two SCSI-320 host channels with 12 or 8 drive bays for SATA II disk
drives in a smartly managed enclosure.
The subsystem combines massive storage capacity with SATA II benefits,
such as high performance and dedicated bandwidth, in a safe environment
where the highest level of data availability is assured. High throughput
is available by segregating I/O traffic across the separate PCI-X
buses, while IOPS performance is delivered through the internal
buffer on the XOR engine and CPU with the help of intelligent firmware
algorithms.
High Performance
Featuring two (2) 64-bit 133MHz data buses, the subsystem's high
data throughput is more than sufficient for small-to-medium-sized
servers or workstations. Robust functionality and adaptive algorithms
facilitate chip-level operation that is already fast and flexible.
For example, a timeout can be configured for individual drive response
time. If a specific disk drive fails to respond in time, the firmware
accumulates data from the adjacent stripes of the array to maintain
a fast return of data.
The adaptive designs assure throughput for a wide range of applications
running on Windows 2000/2003/XP-, Linux-, or Unix-based servers.
Ideal applications include disk-to-disk backup, database, file,
business network, storage consolidation and others.
Enclosure Management
In addition to RAID protection for the disk drives, the PSUs and
cooling modules are both redundant and hot-swappable modules. Even
the battery backup module can be replaced online. The rotation speed
of the enclosure's dual-speed fans is controlled by the firmware.
In critical conditions (for example, PSU or fan failure) the fan
rotation speed is automatically raised to a higher level. Control
over caching behaviors is a user-configurable option. In the event
of component failures, such as UPS failure or low battery charge,
the firmware stops caching write requests in cache memory.
Manageability
The Comet SATA II eU includes a number of interface features
to keep users constantly aware and automatically notified of array
status. The subsystem comes standard with an Ethernet port for local
or remote management using simple telnet protocol or the feature-rich
RAIDWatch Java GUI. The RAIDWatch manager provides graphical presentations
of array components, monitoring windows, and all configuration options.
Additionally, the built-in LCD keypad panel displays event messages
and provides onsite access to all firmware features.
Major Markets and Uses
Caen products are used in disk-to-disk backup, server-attached and
network data storage and in major industries such as medical imaging,
security/CCTV, and digital media including video-on-demand, stream
editing and more.
Intelligent Drive Handling (IDH)
If two bad blocks occur simultaneously on two member drives of an
array, the integrity of the stored data will be endangered. Media
Scan is function that retrieves data from degraded or damaged hard
drives and handles low quality drives in both the degraded mode
and during the rebuild process. To further ensure 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.
Task Scheduler
Media Scan is now armed with a unique function that helps repair
media errors on drives. By combining Task Scheduler with Media Scan,
the scanning operation can be scheduled to begin at a specified
start time and repeated at configured intervals. This hands-free
operation allows each such schedule to be defined to operate on
individual hard drives, all drives of a certain class, all member
drives of a specified logical drive, or all member drives in the
subsystem.
Specifications
Subsystem Characteristics
400MHz RISC processor with 256KB embedded L2 cache
Custom ASIC266 with XOR engine
Battery-protected DDR RAM 256MB standard; supports up to 1GB
2 SCSI-320 host channels
LCD keypad panel
1 Serial COM port
1 10/100BaseT Ethernet port
Diagnostic LEDs on all field-replaceable units
Drive Interface
12 or 8 disk trays
Serial ATA 1.5Gbps and 3Gbps drive support
Host Interface
2 Dual-stacked VHDCI SCSI connectors
Transfer rate: 320MB/s
Tag command queuing
Multiple target Ids
RAID Configurations
Supports RAID levels 0, 1(0+1), 3, 5, 10, 30, 50, JBOD
16 Maximum logical drives
128 Maximum LUNs
Multiple array configurations
Automatic background rebuild
Intelligent drive handling (IDH)
High Availability
Redundant hot-swappable, field-replaceable units
Enclosure and RAID controller self-diagnostics
Dual-stacked connectors for cascading
Li-ION battery backup modules (Optional)
Dedicated and Global hot-spares
Management
RAIDWatch GUI software over local/remote access
Terminal (RS-232C) for local access
Telnet over Ethernet
LCD keypad panel
Widest range of event notification methods: email, fax, LAN broadcast,
SNMP traps, cell phone message, SMS, instant messengers (MSN, ICQ)
OS Support
Microsoft Windows NT
Microsoft Windows 2000 Server
Microsoft Windows 2003 Server
Sun Solaris ver. 8/9
Red Hat Linux ver. 8/9, enterprise ver. 3
SuSE Linux ver. 8/9
Requirements
Input Voltage: 100VAC at 6A; 240VAC at 3A with PFC (auto-switching)
DC Output: 12V-25A; 5V-25A; 3.3V-20A
Relative Humidity: 5% to 95% non-condensing
Operating Temperature: 0 C to 40 C
Dimensions
2U, 19-inch rackmount chassis
Chassis without handles: 446(W) x 88(H) x 490(D) mm (17.6
x 3.5 x 19.3 inches)
Chassis with handles: 482(W) x 88(H) x 505(D) mm (19 x
3.5 x 19.9 inches)
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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Two (2) SCSI-320
host channels; transfer rate up to 320MB/s per channel