V1.0 Vig625M Motherboard Manual
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choice is to utilise Extended CHS mode if the drive topology allows. If neither of the
above methods is possible, the Standard CHS mode is used.
Different operating systems have different abilities regarding IDE translation mode.
UNIX operating systems (as currently implemented) do not support either LBA or ECHS
and must utilise the standard CHS method. UNIX can support drives larger than 528MB,
but does so in its own way.
OS/2 2.1 and OS/2 Warp can support LBA, ECHS or standard CHS methods. Note that
LBA support may require a switch setting on an OS/2 driver in order to operate in that
mode.
OS/2 2.0 & Novel NetWare can support either ECHS or standard CHS methods. In order
to use LBA with NetWare a driver that supports current parameters must be used.OS/2
2.0 does not support LBA.
DOS & Windows can use LBA, ECHS or standard CHS methods. The '32-bit Disk
Access' driver built into Windows WDCTRL.386 can only be used with the standard CHS
method, To use either LBA or ECHS method and '32-bit Disk Access' an alternative .386
driver must be installed, this combination will also provide the best performance. If this
driver is not installed and the drive fitted to the system supports Type F DMA on the ISA
interface or Mode 3 on the PCI interface then higher performance will be achieved by
NOT using '32-bit Disk Access'.