Acer AcerPower APM6 Service Manual page 46

Parameter
IDE Primary/ Secondary Master/
Slave UDMA
IDE DMA Transfer Access
Serial-ATA 1/2
IDE Prefetch Mode
IDE HDD Block Mode
SATA PORT Speed Settings
37
Description
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.
This category allows you to enable
or disable DMA transfer access of
IDE device (or IDE HDD).
Enable / Disable SATA 1 /2. Serial
ATA 1 control port 1 and 3, Serial
ATA 2 control port 2 and 4.
The onboard IDE drive interfaces
supports IDE prefetching, for
faster drive accesses. If you install
a primary and/or secondary add-in
IDE interface, set this field to
Disabled if the interface does not
support prefetching.
Block mode is also called block
transfer, multiple commands, or
multiple sector read/write. If your
IDE hard drive supports block
mode (most new drives do), select
Enabled for automatic detection of
the optimal number of block read/
writes per sector the drive can
support.
This category allows you to
determine the speed of SATA port.
Options
Enabled
Disabled
Enabled
Disabled
Auto
BIOS will determine the speed of
SATA port.
Chapter 2