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The TowerRAID TR4M is a compact RAID tower utilizing the latest SATA II port feature, where one single eSATA cable connects to four 3Gpps SATA II hard drives. It is powered by Western Digital WD10EARS 1TB 64MB Cache 7200RPM SATA300 Hard Drive - w/3 yr warranty. It is specially design for power users, multimedia, video editing, graphic design application who needs high performance and reliable large capacity storage system. Designed with easy installation in mind, the trayless TR4M-B allows instant installation by simply inserting the hard drives after opening the protective ventilating cover. It supports JBOD and Spanning modes for instant storage expansion. It also supports RAID 0, 1 0+1, 5, 5+spare via included software utility, for high performance and hard drive redundancy. The package includes a 2-port eSATA PCIe card at no additional cost, which allows the connection between two TR4M units (up to 8 hard drives) using only two cables. PCI/PCI-X options are also available.

Features:

• 4 Terabyte high performance hard drives using only one cable.
• Host interface:
  • eSATA with Port Multiplier.
• Supports RAID 0, 1, 10, 5, 5+ spare, spanning and JBOD using bundles software utilities.
• Drive interface: 4 x 3.5" SATA I / SATA II Hard drive.
• Supports the latest 1TB Hard Drive. Up to 4TB in storage capacity.
  • Supports Windows 2000, XP, Vista, and Windows Server 2003.
  • Supports MAC and Linux. (Please note that the host adapter card is based on Silicon Image chipset, which currently only support up to MAC OS 10.5.1 by Silicon Image.)

Specification:

Model	TR4M
Form Factor	Compact Tower
HDD Trays	4 Hot-Swappable 3.5 inch
RAID Level	RAID 0, 1, 10, 5, 5+spare, spanning and JBOD (using bundled utilities)
Build-in Capacity	4TB (4x Western Digital 1TB WD10EARS Hard Drive)
Auto Rebuilding	N/A
Hot-Spare	N/A
Host Interface & Transfer Rate	eSATA 3Gbps (via Port Multiplier)
Drive Interface	4 x 3.5?SATA I/ SATA II
Cooling Fan	3.15" Ball Bearing Fan
Power Supply	150W (120V-240V)
Control Interface	N/A
Status Indicators	Power LED and 4 * Access LED
Dimension (in)	5.3"W x 7.1"H x 10.0"D
Weight (lb)	5.9
Safety Regulations	CE, FCC, UL
Limited Warranty	3 Year

Package Contents:

• Western Digital WD10EARS SATA Hard Drive (4)
• TR4M (1)
• Power Cord (1)
• eSATA Cable (1)
• 2-Port eSATA PCIe Adapter Card (1)
• Screws (1 set)
• Quick Installation Manual & CD (1) 
• 3 Years Warranty