I've got a Buffalo Linkstation LSWVL-73B. Firmware version 1.74. Two disks, operating in RAID 1. It's showing Disk 2 Error and flashing the I12 code for degraded RAID. I pulled disk 2 and ran the full set of Western Digital lifeguard diagnostics on it. It passed all. I reinstalled the disk and still had Disk 2 Error. I ran Rebuild Raid Array. It completed in about 10 hours and appeared to solve the problem. However it returned 6 hours later just as before. I swapped out disk 2 for a brand new disk, ran Rebuild Raid Array and the exact same thing occurred. Any ideas on a cause and solution?