The ATA specification tells large disk drives to return C/H/S data of 
16383/16/63 regardless of their actual size (other variations on this 
return include 15 heads and/or 4092 cylinders). Unfortunately these CHS 
data confuse the existing IDE code and cause it to report invalid 
geometries in /proc when the disk runs in LBA mode.

The invalid geometries can cause failures in the partitioning tools; 
partitioning may be impossible or illogical size limitations occur. This 
also leads to various forms of human confusion.

I attach a patch that fixes this problem while strongly attempting to 
not break any existing side effects and await any comments.

mark

Signed-off-by: Mark Bellon <mbellon@mvista.com>