DL380 G5 drive lights

I have a DL380 G5 P400 controller with 8 147gb drives in a raid 6 array (1 hot spare). I am upgrading to ESXI 5.1.  I noticed that drives 5,6,7,8 had no lights on them but were running perfectly. The drive leds on the back plane are working as all drive lights cycle thru blue,green,orange,red as the system starts powering up. I deleted the complete array and recreated it, loaded ESXI 5.1 and now only drives 1,2,3 have lights on all others are off. ESXI reports all drives are healthy and running fine. I pulled drive 7 and immediately the array lit the green light on drive 4 (spare drive) and began rebuilding.
  Any ideas
HWC003Asked:
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HWC003Connect With a Mentor Author Commented:
Reseated all cables, firmware updates, recreated array, and same problem. Since drives are in two banks on the p400 controller I swapped the bank connectors on the P400 controller. It figured out the effectively switched drives and booted up fine. ALL lights now working properly! No idea why.
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Paul SolovyovskySenior IT AdvisorCommented:
Are they all HP drives?  I've seen this on "compatible drives" that don't have the HP firmware.  Make sure that they have  a HP part # and a HP spare # to validate
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HWC003Author Commented:
All drives are IBM. I've got IBM drives in 3 other identical DL380's and they work fine. I tried HP drives in this one and still no drive light. I'm going to reseat everything again today rerun firmware updates and recreate array again today and will report back
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HWC003Author Commented:
Working fine now but cannot explain why. Maybe this will help someone in future.
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