Acer Veriton 5900Pro, Service Manual

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44 Chapter 2
IDE Primary/Secondary Master/Slave
UDMA UDMA (Ultra DMA) is a DMA data transfer
protocol that utilizes ATA commands and the ATA
bus to allow DMA commands to transfer data at a
maximum burst rate of 33 MB/s. When you select
Auto in the four IDE UDMA fields (for each of up
to four IDE devices that the internal PCI IDE
interface supports), the system automatically
determines the optimal data transfer rate for
each IDE device. Auto
Enabled
Disabled
On-Chip Secondary PCI IDE The integrated peripheral controller contains an
IDE interface with support for two IDE channels.
Select Enabled to activate each channel
separately. Auto
Enabled
Disabled
SATA Mode This BIOS feature controls the SATA controller's
operating mode. There are three available
modes - IDE, SATA or AHCI and RAID.
When set to SATA or AHCI, the SATA controller
enables its AHCI features when the computer
boots up.
When set to RAID, the SATA controller enables
its RAID and AHCI functions when the computer
boots up.
When set to IDE, the SATA controller disables its
RAID and AHCI functions when the computer
boots up.
If you intend to create or use a RAID array, you
should set this BIOS feature to RAID. The BIOS
will load the RAID setup utility which you can
access at boot time.
If you do not wish to create or use a RAID array
but would like to make use of the SATA
controller's AHCI features, you should set this
BIOS feature to SATA or AHCI. This skips the
loading of the SATA controller's RAID functions
at boot time, which speeds up the boot process. RAID, SATA or AHCI, IDE
Parameter Description Options