Description The HSJ50 family of StorageWorks array controllers features an I/O rate improvement, a bandwidth jump, and block transfers that are double in. All features of the first generation HSJxx controllers are carried forward into the new HSJ50 family. For transaction oriented-applications, response time can be reduced by as much as 50 percent. Bandwidth-sensitive operations, such as backups, large file transfers, or disk-to-disk copies, take less time than before. Actual performance benefits vary depending on the number of hosts, host adapter quantities and types, application and storage device type, and performance specifications. HSJ50 allows the creation of logical disks with variable capacities. By aggregating unused disk capacity across physical disks, or by creating small logical disks from a single large disk, disc capacity can be guaranteed to a user or an application that requires dedicated disk capacity. A new design that uses a lead/acid battery and allows users to observe fault indicator lights and perform their own battery replacement. The battery now comes in a single or redundant version packaged in a single system building block. Large cash ensures higher levels of read and write performance and maximizes I/O performance for future disk drives. High-density SIMMS packs for the cache modules allow onsite upgrades without returning or exchanging the cache module. Error detection and correction encoding continues to provide the same level of data integrity typically found only on the most current disk drives.
