Acer AW2000h-AW175h F1, Service Manual

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Chapter 9 69
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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.
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DMA Mode
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S.M.A.R.T. For Hard disk drives - Self-Monitoring Analysis and Reporting Technology (SMART)
can help predict impending drive failures. Select
Auto to allow the BIOS to automatically detect
hard disk drive support.
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32Bit Data Transfer - Select Enable to enable the function of 32-bit IDE data transfer.
IDE Detect Timeout (sec) : Use this feature to set the time-out value for the BIOS to detect the ATA, ATAPI
devices installed in the system.
PCI/PnP configuration
Clear NVRAM : This feature clears the NVRAM during system boot. The options are No and Yes.
Plug & Play OS Selecting : Yes allows the OS to configure Plug & Play devices. (This is not required for
system boot if your system has an oerating system that supports Plug & Play.) Select No to allow the BIOS to
configure all devices in the system.
PCI Latency Timer : This feature sets the latency timer of each PCI device installed on a PCI bus.
SR-IOV Supported : Select Enabled to enable Single-Root I/O Virtualization (SR-IOV) support, which works in
conjunction with Intel Virtualization Technology to allow multiple operating systems to run simultaneously
within a single computer via natively-shared PCI Express devices in order to enhance network connectivity
and performance.
PCI-E Slot1 Option ROM : Select Enabled to enable PCI Express Slot1 Option ROM. This will boot the
computer using a network interface unless PCI-E Slot 1 is populated with a graphics device.
PCI IDE BusMaster : When Enabled , the BIOS uses PCI bus mastering for reading/writing to IDE drives.
Select Description
Auto Automatically detect the PIO mode. Use this value if the IDE disk drive
support cannot be determined.
0 Use PIO mode 0. It has a data transfer rate of 3.3 MBs.
1 Use PIO mode 1. It has a data transfer rate of 5.2 MBs.
2 Use PIO mode 2. It has a data transfer rate of 8.3 MBs.
3 Use PIO mode 3. It has a data transfer rate of 11.1 MBs.
4 Use PIO mode 4. It has a data transfer bandwidth of 32 bits.
Enabled Enable 32-bit data transfer.
Select Description
Auto Automatically detect IDE DMA mode when the IDE disk drive support
cannot be determined.
SWDMA0 Use Single Word DMA mode 0. It has a data transfer rate of 2.1 MBs.
SWDMA2 Use Single Word DMA mode 2. It has a data transfer rate of 8.3 MBs.
MWDMA0 Use Multi Word DMA mode 0. It has a data transfer rate of 4.2 MBs.
MWDMA1 Use Multi Word DMA mode 1. It has a data transfer rate of 13.3 MBs.
MWDMA2 Use Multi-Word DMA mode 2. It has a data transfer rate of 16.6 MBs.
UDMA0 Use Ultra DMA mode 0. It has a data transfer rate of 16.6 MBs. It has
the same transfer rate as PIO mode 4 and Multi Word DMA mode 2.
UDMA1 Use Ultra DMA mode 1. It has a data transfer rate of 25 MBs.
UDMA2 Use Ultra DMA mode 2. It has a data transfer rate of 33.3 MBs.
UDMA3 Use Ultra DMA mode 3. It has a data transfer rate of 66.6 MBs.
UDMA4 Use Ultra DMA mode 4. It has a data transfer rate of 100 MBs.
UDMA5 Use Ultra DMA mode 5. It has a data transfer rate of 133 MBs.
UDMA6 Use Ultra DMA mode 6. It has a data transfer rate of 133 MBs.