Installation
Quickview 40 20/30/40GB AT
4-7
CS position may be stored on the PK jumper pins.
4.3.2
Drive Select (DS) Jumper
You can also daisy-chain two drives on the ATA bus interface by using
their Drive Select (DS) jumpers. To use the DS feature, the CS jumper
must not be installed.
To configure a drive as the Master (Device 0), a jumper must be installed
on the DS pins.
Note: The order in which drives are connected in a daisy chain
has no significance.
4.3.3
Master Jumper configuration
In combination with the current DS or CS jumper settings, the Slave
Present (SP) jumper can be implemented if necessary as follows:
Note: The CS position doubles as the Slave present on this
drive.
• When the drive is configured as a Master
(
DS jumper installed
or
CS jumper installed, and the Cable Select signal is set to
(
0
), adding an additional jumper (both jumpers DS and CS now
installed) will indicate to the drive that a Slave drive is
present. This Master with Slave Present jumper configuration
should be installed on the Master drive only if the Slave drive
does
not
use the Drive Active/Slave Present (DASP–) signal
to indicate its presence.
4.3.4
Jumper Parking (PK) Position
The PK position is used as a holding place for the jumper for a slave drive
in systems that do not support Cable Select. The pins used for the
parking position are vendor unique.
