The Organization of Disks II

When a read statement calls for a particular byte from a disk file, the computer’s operating system finds the correct platter, track and sector, reads the entire sector into a special area in memory called a buffer, and then finds the requested byte within that buffer.

When a read statement calls for a particular byte from a disk file, the computer’s operating system finds the correct platter, track and sector, reads the entire sector into a special area in memory called a buffer, and then finds the requested byte within that buffer.