1 what are the differences between ram、rom and flash ram?

　　2 please explain the following terms.

　　raid 0

　　raid 1

　　raid 3

　　raid 5

　　raid 6

　　3 what’s the difference between dns and wins ?

　　4 for a sata 160 gb 10,000rpm disk drive, what is the average amount of time it takes for the data to be read?

　　5 what is a race condition? please provide an example of a race condition.

　　6 small page size gives you small page table (t/f)

　　small page size generates more ltb( translation lookaside buffer) (t/f)

　　small page size causes less page faults (t/f)

　　7 please compare polling i/o with interrupt-drive i/o .

　　in what situation would you favour one technique over the other?

　　8 what is the difference between nas and san storage?