Doing so at an affordable cost was one of IBM's key design criteria. The HDD mechanism and hard disk are packaged as an integrated unit, although both terms are used to describe it.Įngineers at IBM in the 1950s created the hard disk to provide random access to high capacities of data. The HDD positions a hard disk so data is read and written on the correct disk sector. SSDs are faster than traditional rotational media, but have much lower storage capacities than HDDs.Īn HDD uses stacks of electromechanical spinning platters to store nonsequential data, written to sectors within specified blocks on each disk via an actuator arm.
Hybrid hard drives attempt to bridge the gap between flash and fixed-disk Magnetic storage. offer variants of hybrid hard drive technology, typically branded using the SSHD moniker, for particularized consumer use in notebook computers and personal digital assistants. An HHD blends the capacity, cost and performance of physical disk storage with the accelerated performance of flash.ĭata that is frequently written to or retrieved from storage is served from flash memory. A hybrid hard drive (HHD), sometimes known as a solid-state hybrid drive (SSHD), is a mass storage device that combines a conventional hard disk drive ( HDD) and a NAND flash module.
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