Hard Disk Drive Specifications and Jumper Settings C-3
2-GB HARD DISK DRIVE JUMPER SETTINGS
The 2-GB hard drive has three jumper blocks used to configure the drive. These are
identified on the drive as J5 (master/slave select), J6 (dual drive emulation), and J8 (remote
LED option). A summary of the configuration settings follows.
J5 Master/Slave Select
Use JP5 to configure the drive as a master or slave as shown in the following table.
Table Appendix C-3 2-GB Hard Disk Master/Slave Select Jumper Settings
Pins 1-2
Pins 3-4
Description
Open
Open
One drive only configured as master
(default). A spare jumper is installed across
pins 1-3.
Short
Open
One drive only configured as slave
Open
Short
Drive is master with slave present Select
option disabled (default)
Shorted: Cable select option enabled
Short
Short
Cable Select. You must also install a
jumper on pins 6-8 of J8.
J6 Dual Drive Emulation Block
The 2-GB hard drive can be addressed as a single drive in systems that employ logical block
addressing (LBA). If the system cannot address the full volume, the drive can be jumpered
to appear to the system as both a Master and Slave (dual-drive emulation).
Table Appendix C-4 2-GB Dual Drive Emulation Jumper Settings
Pins 1-2
Pins 3-4
Description
Open
Open
Normal single drive operation
(default). A spare jumper is
installed across pins 1-3.
Short
Short
Dual-drive emulation.
J8 Remote LED Option Block
J8 consists of 7 pin-pairs. Only one pin-pair (13-14) has functionality. The rest are reserved
and not used outside the factory. The factory default is to have pins 1-2 jumpered as a
spare. Pins 13-14 can be jumpered to drive a remote LED (pin 13 is – and pin 14 is +).
