because it is raid 5, my data is currently intact.
disk 2 just says Error.
in system/storage/raid array (array 1) it lists the 4 disks
disk 1 Array 1
disk 2 Error
disk 3 Array 1
disk 4 Array 1
I was in the screen above that (Disks) and is why I couldn't find the rebuild button...
on the RAID Array (Array 1) part of the screen, there is a button to rebuild the raid array. when I click it, I get a very ominous warning:
The disk which is used for rebuilding data will be deleted. cannot cancel this operation. Are you sure you want to operate RAID Rebuilding Array 1?
I assume that is in reference to the second disk that I added. but I guess I am wanting to verify before I tell it to go.