Product manual

Introducing CDA 7
77 A1 69UP Rev00 1-5
1.2.3 Performance Features
CDA 7 offers improved performance over conventional Storage Control Units
(SCU). These CDA 7 features enhance performance and increase throughput:
• Large non-volatile cache
• Asynchronous I/O
• Multiple storage directors
• Parallel processing
• 100% Fast Write capabilities
• Rotation Position Sense (RPS) miss elimination
• Segmented device-level buffer
• Ultra SCSI channel speeds up to 40 MB/sec
• Fibre Channel speeds up to 100 MB/sec
1.2.4 Availability Features
CDA 7 maintains data integrity and maximizes system availability with these
features:
• Redundant architecture
• Full system battery backup
• Dual-initiator
• Redundant power subsystem
• Remote Data Facility (SRDF) option
• Mirroring option
• Non-disruptive component repair (under conditions)
• Non-disruptive microcode upgrades (Limited Case)
• Cache error correction and error verification
• Disk error correction and error verification
• Environmental Fault Reporting
• Error checking, correction and data integrity protection