SSDs in servers deliver performance, whether measured in IOPS or GBps or latency, that is just plain impossible with disks. SSD capacity is now greater than that of performance disks. Price is the factor that still keeps many organizations away from deploying servers with SSD storage when the improved performance is not a significant benefit. The better reliability of SSD might be more important. Continue reading SSD vs HDD RAID in Servers and Storage→
Finally, we get to the question, “What replaces hard disk drives?” As many people already know, the answer is solid state disks or SSDs. SSDs are made today to fit the shape, size and interfaces used by hard disk drives (HDDs), but they consist mostly of Flash memory instead of spinning rust, plus a controller and some RAM for buffering, just like a rotating Continue reading Spinning Rust is (almost) Dead, Part 3, SSD Price vs. Performance→
That brings us back to spinning rust. To understand the limitations of rotating hard disk drives, it is important to understand the technology. With a basic grasp of how a disk drive works, the mechanical limitations quickly become obvious. If you are accessing data sequentially in big long chunks, where the disk can read an entire track, move over just one track and read Continue reading Spinning Rust is (almost) Dead, Part 2, Disk Drive Physics→
“Spinning rust?” you may say? Yes, rust, or another iron oxide, is the ferromagnetic coating on the platters spinning inside every hard disk drive. To read and write your data an actuator arm, driven by a separate motor moves a tiny recording head over each platter surface, flying on a microscopic layer of air to change the magnetic polarization one bit at a time. Continue reading Spinning Rust is (Almost) Dead, Part 1, The Pace of Technology→
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