By way of example only, FIG. 1 illustrates a hard disk drive 13 that reads from or writes to non-removable, nonvolatile magnetic media, a magnetic disk drive 14 that reads from or writes to a removable, nonvolatile magnetic disk 15, and an optical disk drive 16 that reads from or writes to a removable, nonvolatile optical disk 17 such as a CD ROM or other optical media.