Disk formatting

Computer must be able to access needed information on command. However, even the smallest hard disk can store millions of bits. How can the computer know where to look for the information it needs? To solve this problem, hard disks are organized into discrete, identifiable divisions, thus allowing the computer to find any particular sequence of bits easily. The most basic form of disk organization called formatting. Formatting prepares the hard disk so that files can be written to the platter and then quickly retrieved when needed. Hard disk can be formatted in two modes: physically and logically.