|Model||Infortrend EonStor A08U-G2421|
|Host-Interface||2x Ultra320 SCSI (2x VHDCI)|
|RAID Controller||400MHz RISC processor with 512KB embedded L2 cache|
|Cache Memory||256MB~2048MB DDR RAM (256 MB installed)|
|Disk Interface||SATA II (3Gbit/s)|
|Harddisk Drives||up to 8x 3.5 LFF SATA II, hot swappable|
|Hot Swap Fan Modules||2|
|Power Supply||2x 350W, redundant, hot-swappable|
|AC Input Voltage||100/240 V (± 10%), 47~63Hz|
|Data Transfer Rate||up to 320MB/s per Host|
|Front Panel LCD and Buttons||easy access for configuration and status report|
|RS-232 Terminal||Command Line Interface (CLI) for configuration and status report|
|Management||RAIDWatch manager software for all major platforms via Ethernet port|
|Event Notification||Build-in buzzer, SNMP trap|
|Supported OS||OS independent|
|RAID Level||0, 1 (0+1), 3, 5, 10, 30, 50, JBOD|
|RAID Features||Multiple arrays configurable with dedicated or global hot spares|
|Online expansion||Adding new drives, copying and replacing drives with drives of larger capacity, automatic background rebuilds, configurable stripe size and write policy per array|
|Dimension and Weight|
|Physical Dimensions/mm (Width x Height x Depth)||482 x 88 x 505 (with handles), 2U RM|
|Weight (without drives)||23.5kg|
|Gross weight (without drives)||25kg|
In addition to RAID protection for the disk drives, thePSUs 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, e.g., 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.
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.
The EonStor A08U include 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.
If two bad blocks occur on two member drives of an array, the integrity of the stored data is endangered. Media Scan, Infortrend's innovative intelligent drive handling function, retrieves data from the damaged sectors. Media Scan handles low quality drives in both the degraded mode and during the rebuild process. For additional data security, other intelligent drive handling features include the transparent resetting of non-responsive hard drives, power-failure management and bad-drive handling during LD expansion.