SUPER MICRO Computer I2DMR-8G2 - Manual (Page 53)

Chapter 4: AMI BIOS
4-5
Type
Select the type of device connected to the system. The options are "Not
Installed", "Auto", "CDROM" and "ARMD".
LBA/Large Mode
LBA (Logical Block Addressing) is a method of addressing data on a disk
drive. In LBA mode, the maximum drive capacity is 137 GB. For drive ca-
pacities over 137 GB, your system must be equipped with 48-bit LBA mode
addressing. If not, contact your manufacturer or install an ATA/133 IDE
controller card that supports 48-bit LBA mode. The options are "Disabled" or
"Auto".
Primary IDE Master/Slave, Secondary IDE Master/Slave
Sub Menu
From the Advanced Setup screen, press <Enter> to access this sub menu
for the primary and secondary IDE master and slave drives. Use this screen
to select options for the Primary and Secondary IDE drives. Use the up and
down <Arrow> keys to select an item. Use the <Plus> and <Minus> keys to
change the value of the selected option.
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 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. It has a data transfer rate of 3.3 MBs. Select 1 to allow
the BIOS to use PIO mode 1. It has a data transfer rate of 5.2 MBs. Select
2 to allow the BIOS to use PIO mode 2. It has a data transfer rate of 8.3
MBs. Select 3 to allow the BIOS to use PIO mode 3. It has a data transfer
rate of 11.1 MBs. Select 4 to allow the 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 specifications of the drive.