NEC POWERMATE P2166 Manual page 115

!
When set to Auto Detected the BIOS will detect
what the drive is capable of, not the translation
mechanism which was used to format the drive.
If a drive is run in a mode other than the mode in
which it was
unpredictable results may occur, including data loss.
Different OS's have different abilities regarding IDE
translation modes:
T
UNIX does not currently support either LBA or ECHS
and must utilize the Standard CHS method. UNIX can
support drives larger than 528 MB, but does so in a
different manner.
T
OS/2 2.1 and OS/2 WARP
or Standard CHS methods. Note that LBA support may
require a switch setting on an OS/2 drive in order to
operate in the mode.
T
OS/2 2.0 and Novell Netware
ECHS or Standard CHS methods, but not LBA.
T
DOS and Windows
Standard CHS methods. If the "Fast 32-bit IDE" option
of Windows is utilized, make sure to use the Standard
CHS setting only, unless a version of WDCDRV.386 is
being used which supports this advanced geometry.
You will get better performance not using "Fast 32-bit
IDE" if using a drive which employs Mode 3 PIO on the
PCI interface, unless using a version of WDCDRV.386
which supports these advanced modes.
CAUTION
partitioned and formatted,
can support LBA, ECHS,
can support either,
can support LBA, ECHS, or
Setting System Parameters 4-9