Is wd out with 500 gb hdd wih 32 mb cache ??
Excellent Example for the elevator.. but .. in computer how does Ncq WORKS.. can anyone expain me about that !!!
Another cool example
The best analogy I've ever heard of what NCQ does is as follows:
You have a restaurant. You drive your truck to a wholesale food warehouse to buy some supplies. You hand a list of items to the warehouse employee, and he gets on a forklift to pick them up. Your list was in no particular order -- you just wrote things down as you thought of them. The employee picks things up in the order that you wrote them down.
That's how an older hard drive without NCQ works.
A hard drive with NCQ is like a warehouse employee who has common sense.
He looks over the list. You want frozen hamburger patties and fish sticks? He goes to the freezer and gets both at one time. Sandwich buns and sweet rolls also on the list? He goes to the section of the warehouse where the breads are stored and picks up both at one time.
In practical usage, what NCQ does is organize the search for data on your hard drive, reducing seek times and possibly reducing wear on the magnetic arm.