IBM iSeries 270 Service Manual page 299

The letters in Figure 3 give the VPD card placement for the system. The letters correlate to the following
cards:
v A = Processor capacity card
v B = Interactive card
v C = L3 VPD card
v D = VPD for MCM 0 in location M21
v E = VPD for MCM 2 in location M11
v F = VPD for MCM 1 in location M16
v G = VPD for MCM 3 in location M14
Note: MCMs and their associated VPD card in location M41 have the same serial number and must
always be kept together. That is, you cannot swap MCM VPD cards between slots or between systems.
Figure 4. VPD card placement on the Network Interface Controller (NIC) card (Location M41)
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Analyze hardware problems