Themis RES-22XR3, Installation Manual

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3-15
Themis Computer
3—BIOS Setup Utility
Advanced Setup Configurations
LBA/Large Mode
LBA (Logical Block Addressing) is a method of addressing data on a storage drive.
In the LBA mode, the maximum drive capacity is 137 GB. For drive capacities over
137 GB, your system must be equipped with a 48-bit LBA mode addressing. If not,
contact your manufacturer or install an ATA/133 IDE controller card that supports
48-bit LBA mode. The options are Disabled and
Auto .
Block (Multi-Sector Transfer)
Block Mode boosts the IDE drive performance by increasing the amount of data
transferred. Only 512 bytes of data can be transferred per interrupt if Block Mode is
not used. Block Mode allows transfers of up to 64 KB per interrupt. Select Disabled
to allow data to be transferred from and to the device one sector at a time. Select
Auto to allow data transfer from and to the device occur multiple sectors at a time if
the device supports it. The options are
Auto (default) and Disabled.
PIO Mode
The IDE PIO (Programmable I/O) Mode programs timing cycles between the IDE
drive and the programmable IDE controller. As the PIO mode increases, the cycle
time decreases. The options are
Auto (default) 0, 1, 2, 3, and 4.
Select Auto to allow the AMI BIOS to automatically detect the PIO mode. Use this
value if the IDE storage drive support cannot be determined.
Select 0~4 to allow the AMI BIOS to use PIO mode 0~4. It has a data transfer rate of
3.3 MB/s~16.6 MB/s. See
Table 3-1 , “PIO Mode Select Options” below.
Table 3-1.
PIO Mode Select Options
Option Selected PIO Mode Max. Transfer Rate
0 PIO Mode 0 3.3 MB/s
1 PIO Mode 1 5.2 MB/s
2 PIO Mode 2 8.3 MB/s
3 PIO Mode 3 11.1 MB/s
4 PIO Mode 4 16.6 MB/s