By way of example only, FIG. 27 illustrates a hard disk drive 2741 that reads from or writes to non-removable, nonvolatile magnetic media, a magnetic disk drive 2751 that reads from or writes to a removable, nonvolatile magnetic disk 2752, and an optical disk drive 2755 that reads from or writes to a removable, nonvolatile optical disk 2756 such as a CD ROM or other optical media.