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Detailed descriptions
16.5 BIOS Setup
SIMATIC Rack PC 840 V2
16-26
Operating Instructions, Edition 05/2006, A5E00248055-04
Primary Master, Primary Slave, Secondary Master, Secondary Slave
The system jumps to the following submenu when you select this type of menu field:
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Figure 16-6 Primary Master (Example)
"Type"
Field
The selectable parameters given here are generally stored on the corresponding IDE
drive. The 'Auto' setting in the 'Type' field means that these values are automatically
read from the drive and written to memory (Auto detect).
If Type is selected for a drive that cannot be detected, a time-out is triggered within
approximately 1 minute and the entries remain unchanged. It is a good idea to select
"Auto" for the interfaces which have a drive connected to them.
Select “User” if you want to define the hard disk drive. You also need to configure the
other options, for example, Cylinder, Heads, Sectors/Track, or other properties of the
hard disk drive.
Select "None" if you have not connected a disk drive. This setting reduces the system
waiting time.
The Multi-Sector Transfers field is used to define the number of sectors that are to be
transferred per interrupt. The value is dependant on the drive used and and should only
be set with the Type field set to "Auto".
Option
“Multi-
Sector
Transfers” Disabled
2,4,8,16 sectors
Option
"LBA Mode
Control"
In LBA Mode Control field (enabled,disabled). When set to “Enabled” hard drive
capacities > 528 MB are supported. The value is dependant on the drive used and and
should only be set with the Type field set to "Auto".