Siemens SIMATIC Panel PC 870 Equipment Manual page 63

Release 11/02
Type
The parameters for selection here are normally stored on your IDE drive. The
"Auto" setting in the Type field means that these values are automatically read
from the drive and written into memory (Autodetect).
If Type is selected for a drive that cannot be detected, a timer times out in
approximately 1 minute and the entries remain unchanged. You should always
check that the interfaces for which you select 'Auto' are in fact connected to
drives.
Select "User" to define the hard disk type, in which case the other fields, such as
Cylinder, Heads, Sectors/Track or other settings, must also be set according to the
hard disk type.
Multi Sector Transfer Field
The entry in the Multi-Sector Transfers field defines the number of blocks
(sectors) transferred per interrupt. The value depends on the drive and should
only be set by setting the Type field to "Auto".
LBA Mode Control
If the LBA Mode Control field (enabled,disabled) is set to 'Enabled', the system
supports hard disks with capacities greater than 528 Mbytes. The value
depends on the drive and should be set only by setting the Type field to "Auto".
32 Bit-IO field
The setting in the 32 Bit-I/O field defines the mode of access to the drive.
Transfer Mode and Ultra DMA Mode fields
The settings in these fields define the interface's data transfer rate. The value
depends on the drive and should only be set by setting the Type field to "Auto".
Hit ESC to exit the submenu.
SIMATIC Panel PC 870 Computing Unit, Equipment Manual
Disabled
2,4,8,16 sectors
Disabled 16-Bit access
Enabled 32-Bit access
Configuring the Computing Unit in BIOS Setup
(default)
5-7