A small fast memory holding recently accessed data, designed to speed up subsequent access to the same data. Most often applied to processor-memory access but also used for a local copy of data accessible over a network etc.
MORE ...Access time is the metric that represents the composite of all the other specifications reflecting random performance positioning in the hard disk.
MORE ...The hard disk platters are spinning around at high speed, and the spin speed is not synchronized to the process that moves the read/write heads to the correct cylinder on a random access on the hard disk. Therefore, at the time that the heads arrive at the correct cylinder, the actual sector that is needed may be anywhere. After the actuator assembly has completed its seek to the correct track, the drive must wait for the correct sector to come around to where the read/write heads are located.
MORE ...We can see the capacity in two aspects: the total capacity and the capacity of one disk. The whole capacity is made up of each disk capacity.
If we increase the disk capacity, we would not only improve the disk capacity, improve the speed of transmission, but also cut the cost down.
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