Common hard disks with read/write heads are magnetic storage.
The newer SSD (solid state drive) hard disks are not magnetic because there are no read/write heads. Solid state means no moving parts.
SSD drives are labeled as such so you know what you are buying.
magnetic disk
Magnetic storage is used on hard drives and floppy disks. Sectors of the disk are charged magnetically and are easily changed later. Optical storage uses a laser to read data. On a cd/dvd, the laser picks up tiny marks made starting in the center and rotating outward.
magnetic
magnetic tapes are cheaper
Hard Disk
A hard drive comes with the Computer. A hard drive is considered permanent as opposed to magnetic tape. The data in tape can be accessed only serially whereas randomly in hard drive.
Information is stored in the computer's hard drive, which is a magnetic disk read by lasers.
Yes
Hard disk has always been a hard piece of ferromagnetic metal, while the floppy disk contains only one flexible magnetic foil.
No, it is an optical disc. A hard disk is defined as a device that stores data on spinning magnetic platters. Although a CD is 'hard' (rigid) as opposed to the flexible inside of a floppy disk, that does not classify it as a hard disk.
A hard disk drive is a type of magnetic storage device. A magnetic storage device stores data on a magnetized medium. Other types of magnetic storage includes magnetic recording tapes and the stripes on credit cards.
Sector is the smallest unit on Hard disk identified & addressed by File System.