Specifications

RAID

1. Multiple arrays configurable with dedicated or global hot spares
2. RAID levels supported: RAID 0, 1 (0+1), 3, 5, 10, 30, 50, and NRAID
3. Online expansion by
   1. Adding new drives
   2. Copying and replacing drives with drives of larger capacity
4. Automatic background rebuild
5. Configurable stripe size and write policy per array

Intelligent Drive Handling

1. In degraded mode: Skipping irreparable blocks to continue rebuild
2. In normal operation: Data block verification and repair

System Components

Redundant, hot-swappable components, designed for no single point of failure

1. 2U RAID enclosure
2. Single RAID controller
3. 8 drive trays
4. Dual redundant power supplies
5. 2 hot-swappable fan modules

Management

1. Firmware-embedded Java-based GUI RAID manager
2. Centralized management of multiple arrays over in-band SCSI or Ethernet
3. Real-time event notification over Email, LAN broadcast, or SNMP traps
4. SNMP 2.0 MIBs with get and set commands
5. Firmware-embedded utility via LCD keypad or RS-232C port

Drive Interface

1. 3.5", 1" high 1.5Gbps SATA disk drives
2. 8 hot-swappable drive trays
3. Automatic bad sector reassignment
4. Drive hot-swappable
5. Dedicated bandwidth to each connected drive

Host Interface

1. Concurrent I/O commands
2. Tagged Command queuing up to 256
3. Variable stripe size per logical drive
4. Optimization setting for random or sequential I/Os

Maintenance & Availability

1. Immediate array availability
2. Drive roaming, array configuration on drives
3. Controller voltage and temperature self-diagnostics
4. 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

What is remarkable is all environmental thresholds associated with this mechanism are user-configurable and that caching mode changes back to write-back once normal condition is restored.

Physical/Electrical

Interfaces:

1. 2 VHDCI 0.8mm SCSI connectors
2. One audio jack for RS-232C serial port (38400, n, 8, 1)
3. One RJ-45 Ethernet port

Power supply:

1. 2 redundant, hot-swappable power supplies with PFC
2. Input: 90~260VAC, 47~63Hz
3. Output: +5V, 25A max.; +12V, 24A max.; +3.3V, 20A max.; 350watts capacity

Cooling fan

2 cooling fans in two separate modules:

Dimensions:

1. Chassis dimensions: 88H x 446.2W x 486.5D mm
2. (w/ protrusions): 88H x 485W x 532D mm
3. Package dimensions: 344H x 600W x 670D mm

System weight (w/o drives):

1. Net weight: 16kg
2. Gross weight: 23.5kg