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Overview
The Comet SATA RAID controller subsystems are the latest in
Caen's highly acclaimed line of SATA RAID products.
The Comet subsystem combines four 2Gbps fibre host channels
with 16 1.5Gbps SATA drives in a single storage subsystem.
This provides users with massive storage capacity in a safe
subsystem environment where a high level of data availability
is assured.
Full-featured redundant RAID controllers embedded in the
Comet subsystems ensure unprecedented data security. A 2Gbps
Fibre Channel expansion port on each controller enables redundant
path connection to external storage devices resulting in an
increase of the overall storage capacity.
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Features
 2Gbps
Fibre Host Channels; transfer rate up to 200MB/sec for each channel
Two,
2Gbps Fibre Channel expansion Ports; Transfer rate up to 200MB/sec
for each channel
Full-featured
redundant controller architecture
Multiple
Logical Drive configurations, each with a different RAID level
Auto
detection, auto rebuild, hot spare, and hot-swappable
LUN
filtering RAID-based and centralized access management in SAN
Up
to 1024 LUNs per host
Intelligent
Drive Handling for managing bad blocks during rebuild and the manual
Media Scan function for data maintenance
Up
to 64TB per LD
Up
to 1GB SDRAM
Variable
rebuild priority to meet a variety of applications
RAIDWatch:
Browser-based GUI manager on all major platforms
MUX Kits
MUX kits ensure versatility in drive-type selection. Selecting SATA-to-SATA
MUX kits allows for the installation of SATA drives into the subsystem.
Selecting the SATA-to-PATA MUX kits enables a user to install PATA
drives into the subsystem, providing a less expensive option for
an economic yet reliable RAID subsystem.
Architecture
Running on architecture trusted by the most demanding applications,
the subsystem is capable of a high level of performance. Its 64-bit
separate-bus backbone is built around the 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 mid-sized servers or workstations. Data can be distributed
at a burst rate of up to 1066MB/sec. The dual independent PCI bus
design eliminates all imminent bottlenecks on IO traffic, providing
sufficient throughput for a wide range of applications on SCSI-based
PCs, single-user workstations, NT, Linux, or Unix-based servers.
These applications include disk-to-disk backup, Video on Demand,
CCTV, and stream editing.
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 Handling features, which provide further data
security, include the transparent resetting of hung hard drives,
power failure management, and bad drive handling during LD expansion.
Specifications
RAID
Multiple
arrays configurable with dedicated or global hot spares
RAID
levels supported: RAID 0, 1 (0+1), 3, 5, 10, 30, 50, NRAID and JBOD
Online
expansion:
1. Add new drives and
2. Copy and replace drives with drives
of larger capacity
Automatic
background rebuild
Configurable
stripe size and write policy per array
Intelligent
Drive Handling
In
degraded mode: Skipping irreparable blocks to continue rebuild
In
normal operation: Data block verification and repair
System Components
Redundant, hot-swappable components, designed for no single point
of failure
3U
RAID enclosure
Dual
redundant RAID controllers
16
drive trays
Dual
redundant power supplies
2
hot-swappable fan modules
SAN Management
LUN
Masking access control over terminal emulation or GUI manager, configurable
filter entry variables
Up
to 1024 LUNs supported
Management
Firmware-embedded
Java-based GUI RAID manager
Centralized
management of multiple arrays over in-band or Ethernet
Real-time
event notification over Email, LAN broadcast, or SNMP traps
Host-side
SES emulation with pass-through to back-end SES emulation
SNMP
2.0 MIBs with get and set commands
Firmware-embedded
utility via LCD keypad or RS-232C port
Drive Interface
3.5",
1" high 1.5Gbps SATA disk drives
16
hot-swappable drive trays
Automatic
bad sector reassignment
Drive
hot-swappable via SCA-II connectors
Dedicated
bandwidth to each connected drive
Host Interface
Auto-negotiate
FC-AL, point-to-point, and switched fabric
Concurrent
I/O commands
Tagged
Command queuing up to 256
Variable
stripe size per logical drive
Optimization
setting for random or sequential I/Os
Maintenance & Availability
Firmware
rolling upgrade on redundant RAID controllers
Synchronized
cache over dedicated Fibre channel
Comes
standard with a Li-ion battery module
Immediate
array availability
Drive
roaming, array configuration on drives
Controller
voltage and temperature self-diagnostics
Auto switch cache policy and Auto shutdown
When a RAID controller detects conditions exceeding preset thresholds,
the following actions will be exerted to protect the hardware:
1. Automatically flush cached data and
switch the array's caching mode from write-back to write-through
2. Commence an auto shutdown
All environmental thresholds associated with this mechanism are
user-configurable and that caching mode changes back to write-back
once normal condition is restored.
Interfaces
6
SFP sockets using a short-wavelength adapter
Four
audio jacks for RS-232C serial port (38400, n, 8, 1) and UPS support
One
RJ-45 Ethernet port
Power supply
2
redundant, hot-swappable power supplies with PFC
Input:
90~260VAC, 47~63Hz
Output:
+5V, 25A max.; +12V, 32A max.; +3.3V, 20A max.; 460watts capacity
Cooling fan
4 cooling fans in two separate modules
Environmental
Operating temperature: 5 to 40°C
Non-operating temperature: -20 to 60°C
Relative humidity: 10~95%, non-condensing
Operating altitude: sea level to 10,000ft
Physical
Chassis dimensions: 131H x 446.2W x 500D mm
(w/ protrusions): 131H x 485W x 532D mm
Package dimensions: 476H x 592W x 695D mm
System weight (w/o drives):
Net weight: 25kg
Gross weight: 32.5kg
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