*_how data is read from disc when data of ram is wipe out absence of electricity???_* *_ How actuator arm read data and send it to ram from tracks sectors ? How does the arm knows that which track is holding data of a particular file? *_
How can we take the data while rotating until we reach the desired sector , if R-W head is not on required sector , disk will rotate so now when desired sector comes then only we start reading the data so how can we say in one rotation we read entire data equal to storage capacity ?
question me kuchh aisa nhi bola gya hai ki R/W head ko pahale track ke starting me le jao and then start reading the data..head jaha hai agar vha se reading start karate hai to us track ko read karane me kitana time lagega yah btana hai.
