A24U-G2421

• Full-featured RAID functionality with two (2) SCSI-320 host channels; transfer rate up to 320MBps each
• Up to 12TB of storage capacity
• Accommodates twenty-four (24) SATA II hard drives, backward compatible with SATA I drives
• Hardware XOR engine by dedicated ASIC266 chipsets
• Dual-speed cooling modules to reduce system noise
• Backplane-based, cableless, modular enclosure

Specifications

RAID

• Multiple arrays configurable with dedicated or global hot spare drives
• RAID levels: RAID0, 1 (0+1), 3, 5, 6, 10, 30, 50, 60,  and NRAID
• Online expansion by:
• Adding new drives
• Copying and replacing drives with drives of larger capacity
• Automatic background rebuild
• Configurable stripe size and write policy per array
• Intelligent drive handling:
• In degraded mode: skips irreparable blocks to continue rebuild
• In normal operation: data-block verification and repair

System Components

• Single RAID controller configuration provides full-featured RAID functionality
• One (1) 4U enclosure
• One (1) RAID controller module
• One (1) 512MB DDR RAM DIMM module preinstalled on the controller module; system supports 512MB to 2GB capacity DIMM modules
• Three (3, N+1) hot-swappable, redundant, 405W power supply units
• Twenty-four (24) hot-swappable drive trays
• Two (2) hot-swappable, redundant cooling modules
• Two (2) forearm front handles
• One (1) optional battery backup unit (BBU)

Host Interface

• Two (2) SCSI-320 host channels interfaced through two (2) dual-stacked VHDCIs
• Tagged command queuing up to 256
• Host-side ordered tag support

Drive Interface

• Twenty-four (24) hot-swappable 3Gbps SATA II drive trays that accommodate 1-inch pitch SATA II or SATA I disk drives
• Native Command Queuing (NCQ) support
• Dedicated bandwidth to each connected drive
• Automatic bad sector reassignment

Management

• Firmware-embedded utility via LCD keypad or RS-232C terminal
• 10/100BaseT Ethernet for out-of-band management
• Two (2) COM ports for local access to firmware-embedded utility and UPS connectivity
• Telnet access via onboard Ethernet port
• Java-based RAIDWatch® Manager
• Graphical user interface
• Local/remote management; in-band or out-of-band via TCP/IP
• Centralized management of multiple subsystems from one management computer
• A variety of event notification methods via the Configuration Client sub-module: email, fax, LAN broadcast, SNMP traps, MSN messenger, ICQ, and SMS short messages
• Secure link over SSL

Indicators

• Onboard alarm
• Module status LED indicators
• Two (2) per drive tray
• Two (2) per cooling module
• One (1) per power supply unit
• One (1) per BBU module
• Three (3) per LCD panel
• Four (4) per RAID controller module
• Two (2) per Ethernet port
• Module failure indication and temperature/voltage readings through I²C bus

Physical/Electrical

Interfaces

• Four (4) 68-pin VHDCIs in dual-stacked configurations Two (2) COM ports for RS-232C terminal and UPS connection (38400, n, 8, 1) One (1) 10/100BaseT Ethernet port

Dimensions

• Chassis without handles: 445W x 174.4H x 498D mm (17.5 x 6.87 x 19.6 inches)
• Chassis with handles 447W x 174.4H x 514D mm (17.6 x 6.87 x 20.2 inches)
• Package: 590W x 480H x 700D mm

System Weight

• Net weight: 36.5kg
• Gross weight: 39.6kg 

A24U-G2421

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