7200 vs 5400 crystal disk mark seagate barracudda

*Everything else - This would be the frame and case that you see when you hold a drive in your hand and the actual drive motor. The electronics board also maintains the speed of the drive motor. This includes the cache (RAM and Flash RAM in the case of a hybrid drive very similar to what's on your mobo) that buffers the data waiting to be written to the platter or read out to the PC. The electronics board - Contains the controller that handles all the comms between the physical data on the platter and the PC. Uses voice coil tech (same as a loudspeaker) and a spring for return to center for fast response. It can only move in/out (relative to the center of the platter) like a turntable arm or optical drive. It literally 'flies' above the platter to reduce friction and wear on the magnetic coating. Works just like the head of a VCR or cassette tape, just way smaller. The head/arm assembly - a very small electromagnetic reader/writer. Data is written in concentric circles called tracks starting from the center of the disk. It is usually a glass or alumininum disk with a very thin magnetic coating. The platter(s) - wherre the data actually resides.

7200 vs 5400 crystal disk mark seagate barracudda