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Key Features 
- Mac OS X, Mac OS X Server, Xsan 2.
and Final Cut Studio 2 qualified storage. - Dual active/active RAID Controllers
(Apple MPIO capable). - Dual 4Gb/s Fibre Channel ports per controller.
- SATA or SAS hard drives (pre-installed & tested)
- RAID Levels 0, 1, 1E, 5, 6 ,10, 50, 60
- Optional Expansion Chassis for up to 32 drives of high performance storage
Active/active Controllers
and I/O Modules The advanced subsystem design includes fully redundant, active/active hot-swappable controllers and load balanced power and cooling units. All system components are monitored for continuous operation and send instant user notification in case of failure or malfunction. The active/active RAID controllers balance the workload across the data paths in normal operation and provide redundant data paths and high availability in the unlikely event of a controller failure. VTrak Expansion Chassis The Promise VTrak E-Class RAID subsystem supports the addition of a 16-bay expansion chassis, doubling the storage capacity . Dual I/O modules with 4x wide SAS interconnects provides redundant connectivity, and 12Gb/s bandwidth. The expansion chassis utilizes the same mechanical design as the VTrak E-Class RAID subsystem, allowing it to share the same key components Warranty Every VTrak E-Class RAID subsystem is backed by the Promise 3-Year limited warranty with 24/7 telephone and email support . When our support confirms a failure in the field, advanced replacement parts are always available to eliminate down time. The Promise VTrak E-Class RAID Subsystem delivers outstanding performance, reliability, and expansion for video and server applications. Configure up to sixteen 750GB 7200-rpm SATA or 300GB 15,000-rpm SAS drives in a 3U rack-optimized enclosure for up to 12TB of raw capacity on one or more RAID sets. Promise RAID is an ideal storage solution for direct-attached or SAN-based server and workstation applications, qualified for use with Mac OS X, Mac OS X Server, Final Cut Studio 2, and Xsan 2. 4Gb Fibre Channel SAN Performance and Reliability Dual 4Gb Fibre Channel host interface ports per controller provide connectivity for direct attached storage and widely deployed storage area networks. With full auto negotiation functionality VTrak E-Class RAID subsystems are perfect for adding capacity to existing Xserve RAID installations and creating new high performance 4Gb per second volumes under Xsan. Easy to Install and Manage 
The VTrak E-Class RAID subsystem features Promise's browser based management interface, WebPAM PROe, eliminating the need to install additional software. All VTrak E-Class RAID subsystems on the network can be configured and monitored using a single, easy-to-manage interface through an out-of-band Ethernet port. RAID configurations can be imported for reproducible optimization and efficient large scale deployments.  SAS and SATA Hard Drive Support
Supporting both SAS and SATA drives allows deployments of tiered storage on a single flexible storage platform. Each standard 3U 19" rack unit supports up to sixteen 15,000-rpm 3.5" SAS or 7,200-rpm SATA 3Gb/s drives. If your application requires large sequential data transfers, like video editing, SATA drives are a perfect fit. If your application requires the efficient random access of many small files such as database and web transactions then SAS drives would provide optimum performance.
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