2 per platter
In a hard drive, the read/write heads float on a cushion of air above the platter. This ensures that there is a tiny gap between the heads and the spinning platter, allowing the heads to read and write data without physically touching the surface of the disk.
Each platter on a hard drive has 2 heads.Every Additional Platter you can multiply x2Example:1 Platter x 2 = 2 Heads2 Platters x 2 = 4 Heads3 Platters x 2 = 6 Heads4 Platters x 2 = 8 Heads5 Platters x 2 = 10 HeadsETC...At least until some new hard drive Architecture comes into place.
The Vertical position of all a drive's read/write heads over their corresponding platter on a specific track, forming a vertical cylinder.
HDI - Head to Disk Interference.
A hard disk can be either internal or external and one can use it to save files. The parts of a hard disk are the disk case, spindle, disk platter, actuator and the read-write arm.
A platter is the portion of a hard disk drive that information is written to.
Read/Write Heads
The concentric magnetic circles that run around a disk platter are called "tracks." Each track is a circular path on the surface of the disk where data is recorded. Data is organized in these tracks, and the read/write head of the disk accesses the information by moving to the appropriate track.
A hard-diskis a component of a hard-disk drive: it is the circular disk on which the magnetic data is stored.The rigid nature of the platters in a hard drive is what gives them their name (as opposed to the flexible materials which are used to makefloppy disk).Hard drives typically have several platters which are mounted on the samespindle. A platter can store information on both sides, requiring two heads per platter.
In computer terms, a "platter".
Sectors / Cylinders
A platter spinner is another name for a disk jockey. A disk jockey would play vinyl recordings in the radio station. They were known as platters.