Siemens SIMATIC PC RI25/45 Technical Description page 60

Motherboard
Multi-Sector
The option Multi-Sector Transfers defines the number of sectors transferred
Transfers per interrupt. This value depends on the drive and should only be set using
the Autotype function.
Disabled
2, 4, 6, 8, 16
LBA Mode Control
A hard disk capacity higher than 528 Mbytes is supported with the setting
"enabled" with the menu option LBA Mode control (which can be enabled or
disabled). This value depends on the drive and should only be set using the
Autotype function.
32-bit I/O
Define the access mode for the drive under menu option 32-bit I/O.
Disabled
Enabled
Transfer Mode
Set the transfer speed to the IDE drive with the menu option Transfer Mode.
This value depends on the drive and should only be set using the Autotype
function.
We recommend you use the Autotype function. Only use the manual setting
option to set old hard disks without IDE features.
Depending on the operating system used; for example, SCO OOT3.0, SORIX
etc., it may be necessary to disable the "LBA Mode" in some cases. Press
<ESC> to exit the submenu.
2-38
1 sector
sectors
16 bit access
32 bit access
SIMATIC PC RI25/45, Technical Description
C79000-G7076-C808-01