Installation
Quantum Fireball Plus AS 10.2/20.5/30.0/40.0/60.0 GB AT 3-5
The configuration of the following Three jumpers controls the drive’s five modes
of operation:
•CS – Cable Select
• DS – Drive Select
•PK– Jumper Parking Position (Slave mode)
• AC– Alternate Capacity
The AT PCB has two jumper locations provided to configure the drive in a system.
The default configuration for the drive as shipped from the factory is with a
jumper across the DS location, and open positions in the CS, PK and AC
positions.
Table 3-1 defines the operation of the master/slave jumpers and their function
relative to pin 28 on the interface. 1 indicates that the specified jumper is installed;
0 indicates that the jumper is not installed.
Table 3-1
Table 3-1 Table 3-1
Table 3-1
AT Jumper Options
Note: In Table 3-1, a 0 indicates that the jumper is removed, a 1 indi-
cates that the jumper is installed, and an X indicates that the
jumper setting does not matter.
3.3.1
3.3.13.3.1
3.3.1 Cable Select (CS) Jumper
Cable Select (CS) JumperCable Select (CS) Jumper
Cable Select (CS) Jumper
When a Quantum Fireball Plus AS 10.2/20.5/30.0/40.0/60.0 GB AT hard disk
drive and another ATA hard disk drive are daisy-chained together, they can be
configured as Master or Slave either by the CS or DS jumpers. To configure the
drive as a Master or Slave with the CS feature, the CS jumper is installed (1). The
drive's position on the 80 conductor Ultra ATA data cable then determines
whether the drive is a Master (Device 0) or a Slave (Device 1). If the drive is
connected to the end of the Ultra (cable Select) data cable the drive is a Master.
If the drive is connected to the middle connection it is set as a Slave.
Once you install the CS jumper, the drive is configured as a Master or Slave by the
state of the Cable Select signal: pin 28 of the ATA bus connector. Please note that
pin 28 is a vendor-specific pin that Quantum is using for a specific purpose. More
than one function is allocated to CS, according to the ATA CAM specification
(see reference to this specification in Chapter 1). If pin 28 is a 0 (grounded), the
CS
CSCS
CS DS
DSDS
DS PK
PKPK
PK PIN 28
PIN 28PIN 28
PIN 28 DESCRIPTION
DESCRIPTIONDESCRIPTION
DESCRIPTION
0 0 X X Drive is configured as a slave
1 0 X Gnd Drive is configured as Master (Device 0) when attached
to the end of a 80 conductor Ultra ATA cable
0 1 X X Drive is configured as a Master
1 0 X Open Drive is configured as a Slave (Device 1) when attached
to the middle of a 80 conductor Ultra ATA cable
1 1 X X Drive is configured as a Master with an attached slave
that does not support DASP