InfiniteStorage (IS) 5500 is for high-bandwidth and high-IOPS applications with enterprise-class reliability. Built upon architecture pioneered in InfiniteStorage 5000, it is designed for applications, such as Lustre implementations and high performance computing (HPC). It can intermix multiple drive types and enclosure densities in a single, scalable system and can be configured as a multi-tier solution for exceptional per-drive performance from fewer drives. It also can match data and usage patterns to the best-suited drive type. Features include fully redundant I/O paths with automated failover, dual-active, hot-swappable controllers and components, mirrored data cache with battery backup that is de-staged to flash, and hardware-based RAID 6 for maximum performance.