Blakerwry: I am using ribbon cables (80-wire), no rounded IDE cables, however CPU, case and system temps measured thru Motherboard Monitor are OK (CPU 42C, case 23C and HDD 32C, latest without HDD cooling and single drive).
I took ESD pre-cautions when mounting the last drive from the RMA, drive crashed suddenly with a strange noise (head crash?), could be handling by the shipper (UPS). I recently replaced the 250W PS with a low-noise 300W quality PS, which worked for over 2 yrs in another PC, so I do not suspect the PS. For some reliability statistics and trends, plse see at the reported failures rates published by a local PC component shop:
Samsung: 200 drives delivered, 1 failure (0.5%)
Maxtor: 150 drives delivered, 20 failures (13%)
Western Digital: 150 drives delivered, 5 failures (3%)
Hitachi: 250 drives delivered, 25 failures (10%).
Eg. the SR Reliability Index show 17% for Maxtor DM+9, 89% for Seagate Cuda V, 51% for Hitachi/IBM 180GXP, WD1200JB 80%
Looks to me the DM+9 series is not in the top-ranking wrt reliability ...