Use the following to keep a record of your components.
Component
Serial Number
pSeries 690
I/O Drawer 1
I/O Drawer 2
I/O Drawer 3
I/O Drawer 4 (or Drawer 7 if installed)
I/O Drawer 5
I/O Drawer 6
I/O Drawer 7
I/O Drawer 8
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pSeries 690 Installation Guide