Location Of The Microprocessor And Vrm - IBM SAN Volume Controller Hardware Maintenance Manual

Removing the SAN Volume Controller 2145-8F4 or SAN Volume Controller
2145-8F2 microprocessor
The SAN Volume Controller 2145-8F4 or SAN Volume Controller 2145-8F2 must always be fitted with
both microprocessors to function correctly.
Figure 250 shows the microprocessors and voltage regulator modules (VRMs).
Figure 250. Location of the microprocessor and VRM sockets
1
VRM 1
2
Microprocessor 1
3
Microprocessor 2
4
VRM 2
Each microprocessor is matched with a VRM and a heat sink. When removing the microprocessor, you
must first remove the heat sink.
Perform the following steps to remove a microprocessor:
1. Turn off the node while ensuring that its data is mirrored and synchronized. See MAP 5350 in the
IBM System Storage SAN Volume Controller 2145 Troubleshooting Guide for more information.
2. To make sure that you can replace all cables in the same ports from which they were removed, record
the position of all fibre-channel and Ethernet cables; then remove all cables from the back of the node.
3. Remove the node from the rack and place it on a flat, static-protective surface. See "Removing the
SAN Volume Controller from a rack" on page 40.
4.
5. Fully loosen one captive screw before loosening the other captive screw. This helps to break the bond
between the heat sink and the microprocessor.
6. Remove the heat sink.
Important: Be careful when handling the microprocessor and heat sink. If you wish to reuse the
thermal grease between the heat sink and the microprocessor, do not contaminate it. If thermal grease
is supplied with your replacement microprocessor, remove all traces of the used thermal grease before
applying the new grease.
7. Rotate the microprocessor socket lever arm upward to its maximum vertical position.
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Chapter 2. Removing and replacing parts
227