Supermicro Supero X6DAL-B2 User Manual page 60

X6DAL-B2/X6DAL-TB2 User's Manual
Block (Multi-Sector Transfer)
Block mode boosts 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 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.
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 manufactured after
1999. For other disk drives, such as IDE CD-ROM drives, check the speci-
fications 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
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