Hello, Thank you for all the responds for this thread. From those, I've learned several things and working on stuffs to eliminate other problems that may cause the harddrives to fail. Several things I pick up from the suggestions, and some conclusion: 1. I am replacing the power supply, making sure that the new power supply has a bit more than what I need amps for each voltage level. So I am calculating the power need for the system too. I heard that if the power supply doesn't have enough amps when all the drives tried to draw power, it may make the drives to suddenly spin down and damage them. In the meantime, I'm going to check the PS that I have now. 2. I am adding more fan(s) in front of the drive bay to push more air through it. I also got a suggestion of a temperature monitoring software, so I'll look at that. 3. The two drives that failed are 200GB drives, which we bough at the same time when building the machine. Another 200 GB drive had failed, which was then replaced by Maxtor (another 200GB), which then failed again, which then was replaced again by a 250 GB, which seems to still be working fine up to now. So these 200 GB drives may come from the same plant or the same batch of bad drives. 4. I am getting an extra hot spare drive, not Maxtor. Thanks again for all the help and respon. They have been helpful. RDB -- Reuben D. Budiardja Dept. Physics and Astronomy University of Tennessee, Knoxville, TN
