Five Best Practices for Disk Drive Storage Decisions

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Somewhat surprisingly, 10,000 RPM or 15,000 RPM drives are not always better for high performance storage demands, such as video and other media streaming applications. That is unless there are numerous independent streams being written or read from the same RAID set. In fact, 4TB 7200 RPM drives have higher sequential speed than 3TB drives and often have higher sustained sequential performance than 15,000 RPM drives. In small RAID sets, the performance limitation might be the drive transfer rate. In large RAID sets, or with large numbers of drives behind a single controller, the limiting factor is likely to be the RAID engine or the SAN interface technology rather than raw disk speed.  So, drives may be chosen based on other factors, such as cost, density or reliability.

With a variety of storage devices available today, it can be difficult to match drives with data types and data center environments. You have to consider factors such as random access performance, sequential performance, cost, density and reliability, and often more. With so many considerations, market hype could steer you toward a fad. Gary Watson, chief technology officer at Nexsan, outlines five best practices to consider when selecting drives for your storage deployment to ensure the best price and performance for your needs.


Related Topics : Fujitsu, Storage Virtualization, Desktop Virtualization, Virtual Tape Library, InfiniBand

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