DEC 525-MB Installation Manual - Page 5

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Table 1. Jumper Functions and Default Settings
Jumper
SS
CS
SY
SP
DS
* Only located at J9
† DS jumpered at J9 and DS open at J12
Drive Select (DS) Jumper Configurations
The drive is configured at the factory as a master drive with the DS pins jumpered on
J9. If you install the drive as a slave, park the factory-installed DS jumper.
The DS jumper is a small plastic block that plugs onto a pair of pins. Figure 2 shows
the J9 DS pins both jumpered (master drive) and open/parked (slave drive).
Function
Reserved for factory use
Cable select
Synchronization (disk array)
Slave present
Drive select
Jumpered
J9
Figure 2. DS Jumper Configurations
Default Setting
*
Open
Open
Open
Open
†
Jumpered
SY
SP
DS
Open/
Parked
SY
SP
DS
L J - 0 3 0 3 9 - T I 0
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