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A hard disk drive consists of one or more thin disks that spin at high speed (1200 to 15000 rpm) while magnetic heads read data from them, hovering extremely close to them without making contact.
hard disk save data on platters. On platters there are tracks and sectors in which the data is saved.
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platters
ATA and Solid State are two different things. ATA is a connector type with SATA being it's newer form. Solid State is a type of drive medium which the data is stored on. A typical Hard Drive uses spinning platters while a Solid State drive uses flash media with no moving parts.
it is the hard disk
If a hard drive is constantly spinning, there is likely too many background programs running. Remove or restrict the programs to slow down the hard drive.
D) cylinder
That's a hard disk.
Hard Disk Drive, Floppy Drive
A computer's hard disk or hard drive stores information such has the operating system, programs, and files. It stores the information as small magnetic fields on the hard disc.A hard disk drive is a non-volatile storage device that stores digitally encoded data on rapidly rotating rigid (i.e. hard) platters with magnetic surfaces.
A computer's hard-drive.