IBM pSeries 630 6C4 - System Attention LED; Checkpoints

Six-Slotted PCI Riser Card Location Codes
Disk Drive Backplane Location Codes
Use the following illustration to aid you in the mapping of a location code to its slot on the disk drive
backplane.
30 Eserver pSeries 630 Model 6C4 and Model 6E4 Service Guide