التخزين على القرص

التخزين على القرص Disk storage (وأحياناً يسمى drive storage) is a general category of storage mechanisms where data is recorded by various electronic, magnetic, optical, or mechanical changes to a surface layer of one or more rotating disks. A disk drive is a device implementing such a storage mechanism. Notable types are the hard disk drive (HDD) containing a non-removable disk, the floppy disk drive (FDD) and its removable floppy disk, and various optical disc drives (ODD) and associated optical disc media.

(The spelling disk and disc are used interchangeably except where trademarks preclude one usage, e.g. the Compact Disc logo. The choice of a particular form is frequently historical, as in IBM's usage of the disk form beginning in 1956 with the "IBM 350 disk storage unit").

Six hard disk drives

Three floppy disk drives

A CD-ROM (optical) disc drive

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خلفية

Audio information was originally recorded by analog methods (see Sound recording and reproduction). Similarly the first video disc used an analog recording method. In the music industry, analog recording has been mostly replaced by digital optical technology where the data is recorded in a digital format with optical information.

سرعة دوران وتخطيط المسار

مقارنة بين عدة أشكال من التخزين على القرص تظهر المسارات (وليس إلى النطاق) ؛ الأخضر والأحمر يدل على بداية نهاية يدل.* بعض CD - R (W) وDVD - R (W) / DVD + R (W) تعمل في مسجلات ZCLV، الجهاز المركزي للمحاسبات أو وسائط CAV.

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