By way of example only, FIG. 2 illustrates a hard disk drive 61 that reads from or writes to non-removable, nonvolatile magnetic media, a magnetic disk drive 71 that reads from or writes to a removable, nonvolatile magnetic disk 72, and an optical disk drive 75 that reads from or writes to a removable, nonvolatile optical disk 76 such as a CD ROM or other optical media.