Maxtor D740X-6L 20.0 AT, Product Manual

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Installation
3-6 Maxtor D740X-6L 20.0/40.0/60.0/80.0GB AT
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.
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When a Maxtor D740X-6L 20.0/40.0/60.0/80.0GB 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 Maxtor 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 drive is
configured as a Master. If it is a 1 (high), the drive is configured as a Slave. In order
to configure two drives in a Master/Slave relationship using the CS jumper, you
need to use a cable that provides the proper signal level at pin 28 of the ATA bus
connector. This allows two drives to operate in a Master/Slave relationship
according to the drive cable placement.
The Maxtor D740X-6L 20.0/40.0/60.0/80.0GB AT hard disk drives are shipped
from the factory as a Master (Device 0 - CS jumper installed). To configure a drive
as a Slave (Device 1- DS scheme), the CS jumper must be removed. In this
configuration, the spare jumper removed from the CS position may be stored on the
PK jumper pins.
CS DS PK PIN 28 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