Magnetic Disk is a storage device and uses magnetization process for data processing like read/write/access operations. A magnetic disk have circular platters coated with magnetic material. Data is stored in form of tracks, spots and sectors. Examples of Magnetic disks are hard disk, floppy disks, magnetic tapes etc.
Optical Disk is again a storage device and use optical storage technology for data processing like read/write/access operations. An optical disk stores data using laser light and is read using the same. Laser light reads data on a spinning disk.
Following are the important difference between Magnetic Disk and Optical Disk.
|Sr. No.||Key||Magnetic Disk||Optical Disk|
|1||Media Type||Multiple Fixed Type||Single Removable Disk|
|2||Signal To Noise Ratio||Intermediate S/N ratio||Excellent S/N ratio|
|4||Usage||Used where random access is needed.||Used where a regular data streaming is needed.|
|6||Data Access||Random Access.||Sequential Access.|
|7||Examples||Hard Disk, Floppy Disk, Magnetic Tape.||CD, DVD, Blu-ray.|
|8||Reuse||Highly reusable and used for random read/write operations.||Most of the optical disks are read-only once written.|
|9||Cost||Costly per MB||Cheaper per MB|