12277772_ly_reached_the_end_of_its_life__Advantages_of_Disk
[0] Random Access [Advantages of Disk] 
No winding or seeking to find information. Within backup applications this contributes to much faster backup and restore times. Hard disk access times are typically 10 milliseconds whilst it can take minutes to seek the the correct place on a tape.
Tape vs Disk Backups, has the tape drive finally reached the end of its life
Advantages of Disk