Q1. Name the parts of the magnetic disk that move during the operation of the disk.Also describe their motion.

Q2. What is involved in low-level formatting of a disk (HDD)?

Q3. When a file is opened for reading the system must keep a read pointer to the location in the file where from the next read is to take place. Where is this pointer maintained (or stored) by the system?

Q4.

A file consists of 20 disk blocks (numbered O to 19). Assume that file control block and directory are already in the memory. A block is to be inserted in the middle of the file (as 10th block). How many disk read and how many disk write I/'O operations are needed if contiguous allocation scheme is used by the file system ?