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 by:
  • Adding new drives
  • Copying and replacing drives with drives of larger capacity
• Automatic background rebuilds
• 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

• One (1) XDAS enhanced 4U enclosure
• One (1) RAID controller module
• One (1) 512MB DDR RAM DIMM module (pre-installed on the controller module)
• Three (3) hot-swappable, redundant, 405W power supply units
• Two (2) hot-swappable, redundant, dual-fan cooling modules running in high/low speeds
• Twenty-four (24) hot-swappable drive trays
• Two (2) front handles
• One battery backup unit (BBU) is optional

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, 3.5-inch SATA-II or SATA-I disk drives
• Native Command Queuing (NCQ) support
• Automatic bad-sector reassignment
• Dedicated bandwidth to each connected drive

Management

• Firmware-embedded utility via LCD keypad or RS-232C port 
• Telnet access via onboard Ethernet port
• 10/100 BaseT Ethernet for out-of-band management
• Two (2) COM ports for local access to firmware-embedded utility and UPS connectivity
• Firmware-embedded Java-based RAIDWatch® manager:
  • Graphical user interface
  • Local/remote management; in-band or out-of-band via TCP/IP
  • Centralized management to monitor and administer multiple RAID units on one screen
  • 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
  • Three (3) per LCD panel
  • Four (5) per RAID controller module
  • Two (2) per Ethernet port
  • Two (2) per cooling module
  • One (1) per power supply unit
  • One (1) per BBU module
  • Two (2) per FC port (One LED is reserved)
• Module failure alert through I²C bus

Interfaces

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

Power Supply Module

Cooling Module

Dimensions

• Chassis without handles: 445(W) x 174.4(H) x 498(D) mm (17.5 x 6.86 x 19.6 inches)
• Chassis with handles: 447W x 174.4H x 514D mm (17.6 x 6.87 x 20.2 inches)