Basically, im having issues with one of my drives, trying to just figure out if it is actually broken or not Tested different cables and so on, still shows as failed. I want to use the Rebuild option or erase the failed drive to see if it allows me. This is my current setup: When i try rebuild i get this: When i try to erase (effectively format) the failed drive i get this: So fair enough i can't rebuild but what will happen if i do erase the failed drive? Will i still have my files on the other hard drive? or will it wipe the whole RAID set? Any help would be appreciated. Need to get this sorted asap really!