IBM SAN Volume Controller 2145-CG8 Hardware Maintenance Manual page 323

Note: It is essential that you perform all the stages of the next step to ensure that the replacement
system is set to the serial number of the original machine. Failure to do this might invalidate the
customer's warranty or service agreement.
19. After you make sure that the node is operating as part of the cluster, perform the following steps to
restore the original machine serial number to the new system board:
a. Start the command-line interface (CLI).
b. Write down the 7-character serial number from the serial number label that is on the front of the
node. Ignore any hyphens (-) in the serial number.
c. On the front-panel display, press and release the down button until the Node panel is displayed.
Write down the node name that is shown on the bottom line.
d. Issue the following command, substituting the values for nodeserialnumber and nodename that you
wrote in the previous steps:
writesernum -sernum nodeserialnumber nodename
where nodeserialnumber is the serial number on the front of the node and nodename is the name of
the node.
For example, to write the machine serial number to the system board when the serial number is
"13-FEDCB" and the node name is "ZYXW3," you would issue the following command:
writesernum –sernum 13FEDCB ZYXW3
Note: The node will restart as soon as the serial number has been written to it.
Replacing the SAN Volume Controller 2145-8G4 system board
All the components that were removed when you removed the system board are reused during the
installation of the new system board.
There are two versions of the SAN Volume Controller 2145-8G4. The original version (Rev 1) has two
microprocessors and eight 1 GB memory modules. The second version (Rev 2) has one microprocessor
and four 2 GB memory modules.
Perform the following steps to install the system board:
1. Lower the right side into place with the system board positioned slightly towards the front of the
box. Lower the left edge of the system board into place and then push the system board towards the
back of the box until it engages in place and the screw holes line up. Take care to ensure that the
Ethernet ports on the rear of the system board engage in the frame cutouts.
Chapter 2. Removing and replacing parts
293