I rebooted Server...and now OM shows online and healthy...go figure.
I had one of the drives showing errors.  I Used OM to take offline...and replaced. I then tried selecting 'Online' and 'Rebuild'...but either unsuccessful.  Currently...new drive, top LED is blinking...and second LED in ON. Status in Open Manage is 'Offline'. Do I simply need to give it more time? Note: Original was 250GB...new is 320GB.  OM stats do read accurate.  Thanks in advance for advice!
Poweredge 840 / Drive replaced via openmanage...not coming online