by Magnetic Disk is a storage device that uses magnetic fields to read and write data on a rotating disk. The most common example is the Hard Disk Drive (HDD), where data is stored on spinning platters, and the read/write head accesses the data. Magnetic disks are known for their large storage capacity (up to several terabytes) and relatively low cost. They are widely used for long-term data storage in desktops, laptops, and servers, but their data access speed is slower compared to solid-state drives (SSDs).
Optical Disk:
An Optical Disk uses laser light to read and write data. Common types include CDs (Compact Discs), DVDs (Digital Versatile Discs), and Blu-ray Discs. Data is stored in the form of pits and lands on the disk’s surface, which the laser reads. Optical disks are commonly used for media storage, software distribution, and data backup. Their storage capacity ranges from 700 MB for CDs to 25 GB or more for Blu-ray discs.
Magneto-Optical (MO) Disk
Magneto-Optical (MO) Disk combines magnetic and optical technologies. Data is stored magnetically, but a laser is used to change the magnetic properties of the disk. MO disks are highly durable and offer moderate storage capacities (typically 640 MB to several gigabytes). They are used in archiving and backup systems where data integrity and longevity are critical.
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