RAID

• Hardware RAID5 & RAID6
• Supports RAID 0, 1 (0+1), 3, 5, 6, 10, 30, 50, 60, NRAID
• RAID Migration
• Configurable stripe size and write policy per array
• Multiple Global, Dedicated, & Enclosure-specific hot-spares
• Intelligent Drive Handling:
  • In degraded mode: skips irreparable blocks to continue rebuild
  • In normal operation: data-block verification and repair

Host Interface

• 4 SAS wide ports
• 12Gbps bandwidth (half duplex) per port
• Concurrent I/O commands
• Tagged command queuing up to 1024
• Max. command queue up to 1024
• Fault-tolerant host links with the EonPath multi-pathing software
• Included cables:
  • NSS2U12SSR – 2x Mini-SAS-to-Mini-SAS SFF-8088 120cm cables

Drive Interface

• 12 3.0Gbps SAS/SATA-II, hot-swappable drive trays
• Accommodates 1-inch pitch, 3.5-inch SAS or SATA-II (3Gbps) disk drives
• S.M.A.R.T. and NCQ support
• Automatic bad-sector reassignment
• Dedicated bandwidth to each connected drive
• In-band enclosure service through the expansion links from expansion enclosures
• Path redundancy to disk drives via edge expanders and expanders on JBOD controllers through separate SAS domains
• MUX kits with port selectors for dual-controller access to SATA drives

System Components

• High density, smartly managed 2U enclosure
• Dual redundant RAID controller
• One DIMM module with capacities from 512MB to 2GB
• Redundant, hot-swappable 530W power supply units
• Redundant, dual-speed cooling modules 
• Twelve (12), hot-swappable drive trays
• Two (2) forearm handles
• Li-Ion battery backup unit (BBU), life expectancy and charge level aware

Management

• COM1 serial port for local access to firmware-embedded utility
• COM2 for UPS connection
• Automated cache flush and caching mode operation per enclosure status
• GUI, Telnet, and SSH system monitoring via Ethernet
• Java-based SANWatch software with Snapshot protection
• Firmware-embedded manager via RS-232C (audio jack) that is platform independent
• Widest range of event notification methods including email, LAN broadcast, fax, SNMP traps, SMS, and MSN
• LCD keypad panel for monitoring and access to all configuration options
• Variable logical drive options per DIMM size
• Module status LED indicators:
  • Two (2) per drive tray
  • Seven (7) per controller module
  • One (1) per power supply unit
  • One (1) per BBU module
  • Two (2) per cooling module
• Presence detection & thermal sensors via I²C bus

Power Supply Module

Redundant hot-swappable power supplies with PFC

Cooling Module

Redundant dual-thermal-fan cooling modules

Environmental Specifications

Dimensions

• Chassis without handles: 446(W) x 88(H) x 498(D) mm (17.56W x 3.46H x 19.6D inches)
• Chassis with handles: 482 (W) x 88(H) x 516(D) mm (18.97W x 3.46H x 20.31D inches)
• Package: 575W x 390H x 780D mm (22.63W x 15.35H x 30.7D inches)

Weight

• NSS2U12SSR: Net weight - 18.71kg (41.16 pounds)
• Gross weight – 25.9kg (56.98 pounds)