Hi I attempted to added an addioanal SAS Expader to an production ML350P G8 server . I wired it up to the the P420 controller however upon boot, only the first 4 orginal drives were detected in the orginal bay. Drives 567and8 were not! nether did the dirives work in the new expander. I wired it back as it was and the the origainal drives work again. Any idears. I was thinking firmware upgrade first, but would like to see if anyone has any other idears as its is a production server so need to mimimise downtime. I have attaced a photo of how I wired it up. The original bay is on the left and the expander is on right of the photo
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