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Overview
The Comet SCSI 16J represents the highest performance standard made
available through Caen's sophisticated RAID technologies. Boasting
a high-performance XOR engine and the complete firmware functionality,
the Comet SCSI 16J is ideal for mass scale storage using SCSI drives.
The series enclosures come with redundant, load-sharing power supplies,
and multiple cooling fans. Critical modules are hot-replaceable.
Adding to an array's availability and manageability, the series
is provided with the most flexible options with system monitoring.
System managers can rectify and be alerted of a system event locally
through fault indicators, remotely through GUI icons in the RAIDWatch
manager, the array-independent Event Monitor, via email, SNMP traps
or LAN broadcast by NPC (Notification Processing Center).
Architecture
The subsystem series is specialized for flexible resource utilization
to manage various-size IOs, random, or sequential access that requires
high-speed throughput. A range of 4 to 256KB array stripe-size and
optimization parameters are adjustable on a per logical drive basis.
With the help of a dedicated XOR and an L2-enabled CPU, IOs are
rapidly distributed between host and drives.
The RAID controllers in the subsystem come in the 4 or 6-channel
version. The system using the 6-channel controllers allows cascading
with a JBOD to scale capacity.
Firmware Capabilities
Designed for the heterogeneous and multi-host environments, the
system supports up to 128 logical drives, 32 logical volumes, and
each of the logical drives can be partitioned into 64 storage sections.
Each of the individual sections can be made available with independent
Host LUNs.
Up to 1024 LUNs per controller, and 64TB per logical drive are
supported. Drives on different channels or different enclosures
can be selected to compose a logical configuration, reducing the
chance of downtime by hardware failure.
Firmware provides numerous options that help to achieve the highest
level of data availability and performance. In addition to the full-featured
RAID and Recovery functionality, it is able to manage imminent causes
of data loss, even those not directly related to RAID.
Automatic disk media scan can be carried out on a preset schedule
to prevent the situation when parity is damaged due to the block
errors across multiple drives. Even if this happens, firmware is
able to salvage most data by skipping unrepairable data blocks.
Other integrity options include:
SMART support with configurable rebuild schemes
Clone failing drive
Automatic reassignment of bad sectors
Parity regeneration, and verification on writes
Scalability
Array capacity can be expanded online by adding drives or replacing
the original drives with drives of larger capacity. Arrays can be
expanded without additional enclosures or powering down the system.
Manageability
The Java-based RAIDWatch GUI manager provides easy-to-use interfaces,
is rich in configuration options, and requires only a web browser
to remotely manage their storage over a network. Its sub-modules,
Event Monitor, and NPC allow system managers to rectify a problem
by its graphical presentations and a variety of notification methods.
Enclosure Management
The RAID enclosure or its cascaded JBOD is monitored through an
I2C bus. An added enclosure is immediately brought online and made
visible through the graphical GUI interface. On occasions like low
battery charge, UPS AC loss, fan failure, or high temperature, an
automatic cache-flush will be initiated. When enclosure or board
temperature exceeds preset thresholds, system will shut down to
protect being damaged.
Specifications
Enclosure type
Single RAID subsystem, or JBOD in 3U, 19" rack enclosure
Interfaces
 Two
Ultra4 SCSI host interfaces
Two
or four Ultra4 SCSI drive interfaces per enclosure
10/100BaseT
for web-based management
RS-232C
serial port
Configuration
Single RAID controller with 16 drives; or 16 drives across two Ultra3
SCSI channels in JBOD
RAID Controller
64-bit
RISC processor w/ 256KB L2 cache
Proprietary
ASIC as hardware XOR engine
Li-Ion
battery-protected, up to 1GB SDRAM
RAM
bus bandwidth: 1066MB/s
Management
Firmware-embedded
Java-based GUI RAID manager over out-of-band connection featuring
global manageability; real-time event notification and monitoring
Firmware-embedded
manager via RS-232C port
LCD
keypad panel (on RAID models)
RAID
RAID
levels: 0, 1 (0+1), 5, 10, 30, 50, NARID, and JBOD
Array
partitioning
Variable
stripe depth per logical drive
Variable
optimization mode per logical drive
Dynamic
array expansion
LUN
mapping/filtering setting per logical partition
Automatic
rebuild, manual predictive rebuild w/ dedicated or global hot spares
Rebuild
Priority, host command queue number tunable
Dimensions
Height: 131 mm; Width: 446.2 mm;
Length: 500 mm
Fault Detection, Monitoring, and Recovery
I2C
enclosure device monitoring
RAID
Controller self-diagnostics
Intelligent
Drive Handling
SMART
support: clone failing drive with spare or replace it online, reaction
schemes configurable
Clustering
support
Parity
background checks and corrections
Components
Power supply 2 redundant hot-swappable power supplies
w/ PFC
Input 90 to 260VAC, 47 to 63Hz
DC output 2V/32A, 38A peak; 5V/25A, 3.3V/20A;
460W
Cooling fan 4 redundant cooling fans in two separate
modules; each capable of 61CFM at 3600rpm
Physical/ Electrical
Interfaces Ultra3 SCSI, LAN port, serial port,
I2C
Input Voltage +90V ~ +260V AC, Auto-switching
Power Consumption 140W w/o drives
Operating Temperature 0 to 40oC
Relative Humidity 10-95%, non-condensing
Altitude Sea level to 10,000 ft
Warranty 3 years for controller & power supply
Drive type
3.5" Low profile 1" pitch SCA
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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