Device Configuration Jumper Settings - LaCie DL DVD±RW Drive User Manual

LaCie DL DVD±RW Drive
User's Manual
5.6. Device Configuration Jumper (Master and Slave) Settings
The IDE interface on the back of your LaCie Dual DVD Drive can support two devices, and most computer motherboards
come with dual IDE interfaces, primary and secondary, to allow up to four IDE devices. The controller is integrated with the
drive, and does not decide which device has priority in communicating with the computer.
In allowing for two devices on the same cable, IDE incorporates a unique configuration to allow control of the devices, called
Master (MA) and Slave (SL). In this configuration, Master means drive 0, and Slave refers to drive 1, which allows the drives
to work independently.
Pin 39 on the IDE interface carries a special signal, called the Drive Active/Slave Present (DASP), that allows the computer to
determine if there is a second (slave) drive attached.
The master drive should be attached to the connector at the very end of the IDE ribbon cable, although it will work in either
position. This is where the Device Configuration Jumper settings become very important – the Device Configuration Jumper
identifies the drive as either the master or slave drive. The drive's controller board will look to the Device Configuration
Jumper for instructions as to whether it is the master or slave device.
The LaCie Dual DVD Drive offers an option as an alternative to the permanent selection of a master or slave – the Cable
Select (CS) option. By using a special type of IDE ribbon cable, CS allows the drive to be auto-configured as either slave or
master.
In CS mode, each device attached to the IDE cable has its jumper set to the CS option. The cable has one important difference
from other typical IDE ribbon cables; with a CS IDE ribbon cable, Pin 28 only connects to the master drive connector. This
way, when the computer is powered on, the IDE interface sends a signal along the Pin 28 wire, and only the device that is
attached to the master connector receives the signal, which then automatically configures the device as the master, leaving the
other device as the slave.
The Device Configuration Jumpers are the six straight angle pins located on the rear of the drive. The jumper is the tiny, black
rectangular piece covering the two vertical pins below the MA letters on the back of the drive.
Your LaCie Dual DVD Drive is pre-configured in the factory to the master setting (MA). By removing the jumper on the pins
and then placing it on the two vertical CS pins, you can configure the device in the CS mode, or place it on the two vertical
SL pins to configure it as the slave device.
In most installations, the jumper should remain in the master position. If possible, you should install the LaCie Dual DVD Drive
on the secondary IDE bus, using a separate IDE cable. If you will be installing the drive on the primary IDE bus, your hard
drive should be set as the master (MA), and the LaCie drive should be set as the slave (SL).
5. Tech Tips
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