OverviewYour disk array unit is an innovative, high-performance fibre storage solution providingmodular scalability, maximum reliability and centralized management. It allows storageresources to be shared between multiple servers and offers a smooth evolution tocomplex SAN environments protecting your initial investment. Your system isconveniently housed and available in a space saving 3U rack-mount design.Figure 1-1 Front ViewYour disk array unit is the perfect solution to consolidate your critical data and easilyhave access to them. To this end, it includes the following: An advanced Fibre Channel-Arbitrated Loop (FC-AL) architecture providing a2Gbps data transfer rate and enhanced connectivity to disks. Support for RAID levels 0, 1, 5 and 10 for maximum data reliability. Expandable storage capacity with the connection of up to six disk enclosuresaccommodating up to 90 additional hard disk drives. Centralized management using NEC Storage Manager software (iSM), whichsimplifies storage subsystem set-up and management by integrating RAIDconfiguration and volume management features into a single application. NECiSM software displays the configuration of logical disks and controllers, notifiespotential troubles or faults and monitors the global performance of the system.Your disk array unit features or has the option to feature the following majorcomponents: A high-performance microprocessor. 3 to 15 high-speed disk modules spinning at 10,000rpm or 15,000rpm, providinga maximum capacity of 2Tbytes. 2Gbps Fibre Channel controllers for both host and disk module interfaces. 512MByte cache memory for each controller. Redundant power supplies, fans and even battery backup units maximizingsystem uptime.1-2 System Overview