IBM 5000 - Manual (Page 180)

Changing Jumper Positions
Changing Jumper Positions
The DASD backplane, which is the Netfinity 5000 SCSI backplane, contains two-pin
jumper blocks, which are behind the daughterboard (SAF-TE) on the DASD
backplane. Jumper block J4 controls the addressing of the SCSI hard disk drive
hot-swap bays. See “SCSI Jumpers” on page 173 for details.
Two-Pin Jumper Blocks
Covering both pins with a jumper specifies one function of the jumper block.
Covering one pin only or removing the jumper entirely changes the function of the
jumper block. To change a jumper's position for a two-pin jumper block:
1. Turn off the server; then disconnect the server power cord.
2. Remove the server cover (see “Preparing to Install Options” on page 43).
3. Locate the jumper block, removing any adapters or components that may
hinder access to the jumper block.
4. Do one of the following:
Remove a jumper by performing either action:
– Lift the jumper straight off the pin block.
– Align one of the holes in the bottom of the jumper with one of the pins
on the pin block, and then slide the jumper onto that pin only.
Place a jumper by aligning the holes in the bottom of the jumper with the
two pins on the pin block, and then sliding the jumper onto these pins.
5. Replace any components or adapters that you might have removed.
6. Reinstall the server cover and connect the cables (see “Completing the
Installation” on page 76 for instructions).
172 Netfinity 5000 Server Hardware Information and Procedures