4.2.1 Data comparison technique
Before activating any of the device drivers, gather enough data
from similar sectors on each of the disks such that each one can be
uniquely identified.
After activating the device drivers, compare data from the drives using
the operating system drivers. This should hopefully be sufficient to
provide such a mapping.
Problems:
- The data on some bios devices might be identical (so the part
reading the drives from the bios should have some mechanism to give
up).
- There might be extra drives not accessible from the bios which are
identical to some drive used by the bios (so it should be capable
of giving up there as well).