Roy J. Tellason wrote to Will Honea on 04-22-1998
RT> LG> Also, do NOT enable LBA in the bios. OS/2 will handle the disk 
RT>  LG> mapping arrangements once the drivers load, but the boot tracks 
RT>  LG> and such need to be in a partition in the first 1024 cylinders 
RT>  LG> for -any- operating system to load.
RT> 
RT> Or am I missing something here?
Somebody sure is!  The only part LG got right was the part about 1024
cylinders - but even there you need to realize that it 1024 LOGICAL
cylinders.  From experience, the BIOS mapping (which is what
BootManager uses to FIND the boot code for whatever partition your
gonna boot) has to macth the mapping which OS/2 sees when it takes over
from int13.  You gotta be REALLY good to figure any way to swap maps in
mid-stream!  Regardless of whether you use LARGE, LBA, or NORMAL
mapping, OS/2 has to see the same, period.  FYI, I was unable to get
BootManager to work with anything but the first (C:) partition without
some form of mapping in BIOS, even if OS/2 was happy to use the disk
once you got booted - which I couldn't do from that disk.
RT> 
RT>  WH> make a note of the 'cyl/hd/sec' numbers it gives.  Older Bios's 
RT>  WH> had some funny notions about what LBA was! 
RT> 
RT> What would you call "older" in this context?  FWIW I have 
RT> an Award BIOS here with a date of 1/17/96.
That's reasonably recent.  I have several around from '93 on up and
there must be 4 or 5 different mappings, depending on the release date
(and OEM).
Will Honea 
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