HP StorageWorks Cache LUN XP lets you reserve areas of memory cache on your HP StorageWorks XP disk arrays to store frequently accessed information. It improves file access times and enables faster data transfers. Assigning information to on-board cache speeds up access to your data because cache-resident data is available at host data transfer speeds for both read and write operations. Cache LUN XP redirects I/O requests from the XP disk drives to data locked in the array's cache. It's transparent, it's simple to implement, and the performance gains it delivers are immediate.