Supermicro 8025C-3R User Manual page 69

Primary IDE Channel Master/Slave, Secondary IDE Channel Master/
Slave
These settings allow the user to set the parameters of Primary IDE Channel Master/
Slave and Secondary IDE Channel Master/Slave slots. Hit <Enter> to activate
the following Submenu screen for detailed options of these items. Set the correct
confi gurations accordingly. The items included in the Submenu are the following:
Type
This feature allows the user to select the type of device connected to the system.
The options are Not Installed, Auto, CDROM, and ARMD.
LBA/Large Mode
Logical Block Addressing (LBA) is a method of addressing data on a disk drive.
In the LBA mode, the maximum drive capacity is 137 GB. For drive capacities
over 137 GB, your system must be equipped with a 48-bit LBA mode address-
ing. If not, contact your manufacturer or install an ATA/133 IDE controller card
that supports 48-bit LBA mode. The options are Disabled and Auto.
Block (Multi-Sector Transfer)
This feature allows the user to use the Block Mode to boost the IDE drive per-
formance by increasing the amount of data transferred. Only 512 bytes of data
can be transferred per interrupt if the Block Mode is not used. If the Block Mode
is used, data will be transferred of up to 64 KB per interrupt. If set to Disabled,
data will be transferred from and to the device one sector at a time. If set to
Auto, data will be transferred from and to the device multiple sectors at a time
if the device supports it. The options are Auto and Disabled.
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. The options are Auto, 0, 1, 2, 3, and 4. Select Auto
to allow the AMI BIOS to automatically 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 specifi cations of the drive.
7-5
Chapter 7: BIOS