A hard disk has four surfaces (that\'s top and bottom of two platters). Each tra

Question

A hard disk has four surfaces (that's top and bottom of two platters). Each track has 2,048 sectors and there are 131,072 (217) tracks per surface. A block holds 512 bytes. The disk is not "zoned." What is the total capacity of this disk?

What is the best way to answer this. I have just mulitpliy each number together to get the answer but I'm not sure.

When a cache hit to a cache on the CPU chip occurs on a memory write the cache will be updated, but the main memory will not be unless the designers of the memory subsystem have taken steps to do so. What effect does a mismatch between cache and main memory have on a computer with two or more CPU chips?

Explanation / Answer

Hard Disk Total Surface =4

A block hold = 512 bytes

Each Track Has 2,048 Sectors and each Surface = 131,072

so 4*512*2048 * 131072 =549755813888

Cache is one component that is useful for future request for that data can be served Faster.

A Cache hit occurs when requested data found in Cache.

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