hard disk

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hard disk

a computer data storage medium that consists of a rigid disk with an electromagnetic coating allowing information to be transcribed onto and from it. Permanently mounted in a dust-proof container, a hard disk has a storage capacity many times that of a diskette. Also called hard drive. Compare diskette.
References in periodicals archive ?
This unmatched system density enables up to 440 TB of solid state storage in a single industry-standard rack, delivering the same capacity that would otherwise take more than three racks of 15K RPM disks.
Service providers building public and private cloud computing services, such as VMs and on-demand storage, can now do so with a flash-based platform that offers both high capacity and 90% lower energy, cooling, and rackspace costs than traditional 15K rpm disk arrays.
SAS drives provide outstanding performance with 10K rpm and 15K rpm disk drives with capacities of 146 GB, 300 GB and 400 GB for primary applications including database, transaction processing, video and other high performance requirements.