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Overview
The Comet SATA II 16eF is built around Infortrend's next-generation
500266 custom-built ASIC with XOR engine. Boasting a 2GB internal
bandwidth, the architecture features the 133MHz 60x bus from the
CPU with the dual PCI/PCI-X buses for I/O transactions.
The Comet SATA II 16eF combines two 2Gbps Fibre host channels
with 16 drive bays for SATA II or PATA drives in a smartly managed
enclosure. High throughput is available by segregating I/O traffic
across the dual PCI-X buses, while IOPS performance is delivered
through the 512KB buffer on the XOR engine with the help of intelligent
firmware algorithms.
High Performance
Featuring a 64-bit 133MHz data bus, 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 satisfy applications that
require rapid transfer of data.
When processing I/O requests of diverse characteristics, adaptive
write caching is dynamically engaged to optimize array performance.
If the firmware recognizes sequential strings of write requests,
write caching is automatically disabled. Write caching is automatically
enabled when receiving random requests.
These adaptive designs assure sufficient throughput for a wide
range of applications for Windows 2000/2003/XP, Linux workstations,
or Unix-based servers. Ideal applications include disk-to-disk backup,
Video on Demand, CCTV, stream editing, and others.
Dongle Kits
The availability of two types of separately purchased dongle kits
(see table) ensures versatility in drive type selection. The SATA-to-PATA
dongle kits enable a user to install PATA drives into the subsystem,
providing a less expensive option for an economic yet reliable RAID
subsystem.
Dongle Board IFT-9270AN1S1P
Dongle Drive Tray IFT-9273ADT1S1P
Conversion SATA-to-PATA
Enclosure Management
The Comet SATA II 16eF subsystem incorporates massive storage
capacity in a safe environment where a variety of hardware and firmware
mechanisms ensure the highest level of data availability. In addition
to RAID protection for the disk drives, the PSUs and cooling modules
come implemented as redundant/hot-swappable modules. Even the battery
module can be replaced online.
The rotation speed of the enclosure's dual-speed fans is controlled
by the firmware. In critical conditions, e.g., PSU or fan failure,
the fan rotation speed is 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.
Intelligent Drive Handling
If two bad blocks occur on two member drives of an array, the integrity
of the stored data will be endangered. Media Scan is an innovative
Intelligent Drive Handling 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. For further 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.
Media Scan has a unique function that helps repair media errors
on drives. By combining the 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 of all logical drives.
Specifications
RAID Controller
 600MHz RISC processor
with 512KB embedded L2 cache
Infortrend custom-built
ASIC 500266 with XOR engine and ECC support
Standard 256MB cache
memory in one DDR RAM DIMM with optional BBU
LCD keypad panel
System Voltage/Temperature
self-monitoring
Two RS-232C (Audio
Jack) serial ports, one serial port is for text mode management
and the other provides UPS support.
One 10/100BasT Ethernet
Port
32KB NVRAM with RTC
(Real Time Clock)
Audible alarm
RAID Operation
RAID level 0, 1 (0+1),
3, 5, 10, 30, 50, JBOD and NRAID
Multiple RAID selection
Hot-spare drive operation
Drive hot-swapping
Automatic background
rebuild
Online expansion
Host Interfaces
Two 2Gbps Fibre Channels
Management Software
GUI, Telnet, and
SSH system monitoring via out-of-band Ethernet
RAIDWatch manager
software for Windows and Linux platforms via an Ethernet port
Firmware-embedded
manager via RS-232C (Audio Jack) (platform independent)
Wide range of event
notification methods, including Email, LAN broadcast, Fax, SNMP
Traps, SMS, MSN, and ICQ
External Connections
Two SFP ports for
optical Fiber connection
Two RS-232C (Audio
Jack) serial port connectors (38400, n, 8,1)
One RJ-45 Ethernet
port
Enclosure Dimensions
excluding front handles |
including front handles |
130.0mm |
131.0mm |
445.0mm |
482.6mm |
488.2mm |
504.3mm |
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