Chapter 2
2-10
Connectors
Hard Disk Connectors: IDE1 & IDE2
The mainboard has a 32-bit Enhanced PCI IDE and Ultra DMA 66/100/133
controller that provides PIO mode 0~4, Bus Master, and Ultra DMA 66/100/
133 functions. You can connect up to four hard disk drives, CD-ROM, LS-
120 or other IDE devices. The included IDE power cable has two large
connectors and two small connectors. The large connectors can be used for
IDE devices such as hard disks and optical drives. One of the small
connectors can be used for IDE devices such as slim optical drives, but the
other must be connected to IDE_POWER (see page 2-6).
The first hard drive should always be connected to IDE1. Master and Slave
drives can be connected to both IDE connectors. You must configure the
drives to the desired mode by setting the jumper accordingly. If you install
two hard disks on a single cable, you must set the jumper on the second hard
disk drive to slave mode. Please refer to the hard disk documentation
supplied by hard disk vendor for the jumper settings.
Both IDE1 and IDE2 have a 20th pin included. The 20th pin was added to
provide extra voltage to power 40-pin Disk-on-Modules (DOM). See
Voltage Selector: J1 on page 2-17. You must use IDE cables that do not
block the 20th pin.
IMPORTANT:
Before adding IDE devices, refer to Appendix C for the onboard
power specifications to figure out how many devices can be supported.
IDE1 IDE2
