Supermicro SUPERSERVER 6014V-T2, Руководство пользователя, Страница: 73 / 120

Chapter 7: BIOS
7-7
PIO Mode
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 , 0, 1, 2, 3, and 4. Select Auto to
allow the AMI BIOS to auto detect the PIO mode. Use this value if the IDE disk
drive support cannot be determined. Select 0 to allow the AMI BIOS to use PIO
mode 0. It has a data transfer rate of 3.3 MBs. Select 1 to allow the AMI BIOS
to use PIO mode 1. It has a data transfer rate of 5.2 MBs. Select 2 to allow the
AMI BIOS to use PIO mode 2. It has a data transfer rate of 8.3 MBs. Select 3
to allow the AMI BIOS to use PIO mode 3. It has a data transfer rate of 11.1
MBs. Select 4 to allow the AMI BIOS to use PIO mode 4. It has a data transfer
rate of 16.6 MBs. This setting generally works with all hard disk drives manu-
factured after 1999. For other disk drives, such as IDE CD-ROM drives, check
the specifi cations of the drive.
DMA Mode
Select Auto to allow the BIOS to auto detect the DMA mode. Use this value if
the IDE disk drive support cannot be determined. Select SWDMA0 to allow the
BIOS to use Single Word DMA mode 0. It has a data transfer rate of 2.1 MBs.
Select SWDMA1 to allow the BIOS to use Single Word DMA mode 1. It has a
data transfer rate of 4.2 MBs. Select SWDMA2 to allow the BIOS to use Single
Word DMA mode 2. It has a data transfer rate of 8.3 MBs. Select MWDMA0 to
allow the BIOS to use Multi Word DMA mode 0. It has a data transfer rate of
4.2 MBs. Select MWDMA1 to allow the BIOS to use Multi Word DMA mode 1. It
has a data transfer rate of 13.3 MBs. Select MWDMA2 to allow the BIOS to use
Multi-Word DMA mode 2. It has a data transfer rate of 16.6 MBs. Select UDMA0
to allow the BIOS to 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. Select UDMA1 to allow the BIOS to use Ultra DMA mode 1. It has a data
transfer rate of 25 MBs. Select UDMA2 to allow the BIOS to use Ultra DMA mode
2. It has a data transfer rate of 33.3 MBs. Select UDMA3 to allow the BIOS to
use Ultra DMA mode 3. It has a data transfer rate of 66.6 MBs. Select UDMA4
to allow the BIOS to use Ultra DMA mode 4 . It has a data transfer rate of 100
MBs. The options are Auto , SWDMAn, MWDMAn, and UDMAn.
is not used. Block mode allows transfers of up to 64 KB per interrupt. Select
Disabled to allow the data to be transferred from and to the device one sector
at a time. Select Auto to allows the data transfer from and to the device occur
multiple sectors at a time if the device supports it. The options are Auto and
Disabled.