• 2 Fibre Channel Arbitrated Loop (100 MB/second) Host Channels
  
  
• Sustains over 57 MB/second with only 5 disks
  
  
• Sustains over 4000 I/O operations/second
  
  
• 6 Wide Ultra SCSI Disk Channels
  
  
• Zero Overhead Parity Calculations
  
  
• Pipelined Read Operations
  
  
• Duchesnian Caching Algorithms

• 256 MB of Cache (4 SIMM slots)
  
  
• 15 Tiers of Disks (90 disks)

Maximum Reliability

• Seamless Uninterrupted Operation after Disk Failure with No Performance Degradation
  
  
• Dual Controller with Automatic Failover

The Digi-Data Z-9552 Dual Fibre Channel RAID 3&5 Controller is scalable in multiple dimensions: the Fibre Channel host connections enable cable lengths up to 33 meters (copper cable) and up to 500 meters (fiber optic cable) to support distributed network environments, the cache memory is expandable up to 256 MB to support multiple host processes without frequent cache flushes, and the six disk channels can support up to 15 disks per channel to support the largest storage applications.

The sophisticated reliability features of the Z-9552 complement its high performance to provide the fault tolerance required for online applications.

With its two Fibre Channel host connections, the Digi-Data Z-9552 RAID 3&5 Controller offers industry leading performance to support the most demanding applications, including:

• Network file server
  
• On-Line Applications Processing
  
• Medical imaging
  
• Dual stream video editing
  
• Digital prepress
  
• Internet service providers

Enhanced Duchesnian caching logarithms

Seamless uninterrupted operation if a disk fails, with no performance degradation

Automatic background reconstruction of data from failed disk onto global hot spare, with user selected reconstruction priority