Western Digital WDE2170 User Manual
Page 36
The Option Block
WD Enterprise WDE2170/WDE4360
RELEASED 04-08-97
4079-001045 Rev. B
28
5. T
HE
O
PTION
B
LOCK
The WD Enterprise drive PCBA contains an option block that controls the drive’s operation.
This block is equipped with jumper pins that correspond to various options controlled by SCSI
commands. Jumpers are used to enable or disable the options and modify the drive configuration.
The user-configurable jumpers appear in Table 5-1.
Note: Jumpers should only be changed when the drive is powered down.
5.1. Physical
Characteristics
The block consists of a 2-pin by 17-pin male header. Pin-to-pin spacing is 2 mm by 2
mm.
5.2. Pin
Designation
The pin layout appears below. The diagram represents the view as seen by the customer.
Figure 5-1. Option Block and LED Pin Designation
ANODE
CATHODE
2
1