How do I resolve my Intel Storage Manager array showing degraded when the drives are showing normal

I have a Raid 5 array in my computer.  My computer is a ASUS Mobo with an I7 processor and intel chips onboard.  The Raid 5 array is made up of 3 Sata HDD's all 1 TB in size, giving me just under 2 TB's of useable storage.  Recently one of the drives showed an error and my array started running in degraded.  I set the drive back to normal and had it rebuilding the array.  The rebuild failed.  Some sort of insert(?) error and when I rebooted the workstation, the 3 drives all show in normal mode but ISM says I'm still running in degraded mode.  I thought I was supposed to get an opportunity to complete the rebuild after the reboot?  

My computer seems to be running slow.  I'm pretty sure the i/o to the array is poor.  The workstation just seems to hang sometimes and if I let it go, it eventually does whatever read/write it was trying to do.

I have attached a pdf that shows the different screens in ISM.  Hopefully, someone can tell me what I need to do to get the array working properly again.
Intel-Storage-Manager-Degraded-Mode-When
jdancelSr Network and Systems AdministratorAsked:
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Davis McCarnOwnerCommented:
The odds are that the drive which reported the error is actually failing.  I would suggest replacing it and then letting the array rebuild.
Unfortunately, it is very difficult to view the SMART attributes of drives configured in an array which is a shame as it would let the drive tell us about its own health.
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