@carlytron seems like a corrupted directly, backup the data off the hard drive and create a new partition/directly and test drive
@chiossone do you get an error message? have you done any recent updates to the OS? Call us 1-888-426-5214
@adamepc what type of problem or issue are you having? please provide more details so we can better assist you.
@adamepc El Capitan no longer has RAID support within disk utility, you would need to use a 3rd party RAID tool for 2x RAID units as one.