HP Smart Array controller adaptive read-ahead caching eliminates issues with fixed read-ahead schemes that increase sequential read performance but degrade random read performance. The controller disables read-ahead when it detects non-sequential read activity. The processing engine is essential for high performance operations at these RAID levels, particularly write performance. Both RAID 5 and RAID 6 use mathematical XOR (Exclusive or) operations to calculate the parity data written to the drive array for data recovery. The Smart Array processing engine is responsible for processing all operations, but its capabilities are particularly critical to complex RAID functions such as write operations. We provide administrators with tools for Smart Array configuration, storage management, and diagnostics. HP engineers continue to enhance Smart Array performance, expansion, migration, and data availability capabilities. Our Smart Array controllers support RAID levels 0, 1, 1+0, 5, 6, 50, and 60. Today, RAID is an industry-standard technology used for most online network data storage. Introduction In 1989, HP (then Compaq) was the first company to introduce RAID subsystems in the network server marketplace. HP Smart Array controller technology Technology brief, 4th edition Introduction.
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