Supermicro SUPERSERVER 6013A-T, User Manual

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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 allow the data transfer to and from
the device to take place 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 the 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 BIOS to auto detect the PIO mode. Use this value if
the IDE disk drive support cannot be determined. Select 0 to allow the BIOS
to use PIO mode 0 (for a data transfer rate of 3.3 MBs). Select 1 to allow
the BIOS to use PIO mode 1 (for a data transfer rate of 5.2 MBs). Select 2
to allow the BIOS to use PIO mode 2 (for a data transfer rate of 8.3 MBs).
Select 3 to allow the BIOS to use PIO mode 3 (for a data transfer rate of
11.1 MBs). Select 4 to allow the BIOS to use PIO mode 4 (for 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 specifications 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, which has a data transfer rate of
2.1 MBs. Select SWDMA1 to allow the BIOS to use Single Word DMA mode
1, which has a data transfer rate of 4.2 MBs. Select SWDMA2 to allow the
BIOS to use Single Word DMA mode 2, which has a data transfer rate of 8.3
MBs. Select MWDMA0 to allow the BIOS to use Multi Word DMA mode 0,
which has a data transfer rate of 4.2 MBs. Select MWDMA1 to allow the
BIOS to use Multi Word DMA mode 1, which has a data transfer rate of 13.3
MBs. Select MWDMA2 to allow the BIOS to use Multi-Word DMA mode 2,
which has a data transfer rate of 16.6 MBs. Select UDMA0 to allow the
BIOS to use Ultra DMA mode 0, which has a data transfer rate of 16.6 MBs.
This is 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, which has a data