Well thanks for the response.....and I know most people report temps around 45c. I cannot hear either of these two Maxtor drives at all, so sound is not a factor.
However, hard drive failure is becoming more and more common. Manufactures have reduced the warranty down to one year. With larger drives, you stand to lose more data if a drive fails. Backing up large drives is becoming more difficult due to this increased size. From personal experience I know four people who had drive failures...recently.
And I don't want it to happen to me. I suspect heat to be the biggest factor in these failures. So it follows I'd like to keep the temps down. At the same time I don't want excessive noise. So I am experimenting with different hard drive cooling solutions.
Thanks for any more ideas.
Bingo. If you spend some time at StorageReview forums you'll see lots of discussion about HDD temps vs. reliability. Consensus seems to be that you should keep your temps down. It doesn't take much airflow to do this either. The Barracuda IV on my quiet rig was running at 40C without any fan in front of it. I put a 5-volted Panaflo L1A in front of it and the temps dropped 7-8C. That's a big drop with just a small amount of airflow added.
A few general comments on this thread:
Mounting: Drive engineers say it's OK to mount any modern HDD in any attitude as long as it's not at an angle, i.e keep it flat, 90 degrees, 180 degrees (upside-down), 270 degrees. It also doesn't matter if it's oriented along the short side or the long side. Many SCSI racks mount the drives 90 degrees on their long side, many OEM's have their drives mounted standing up on their noses, etc.
Drive temps: I own many HDDs from various manufacturers and keep track of the temps on all of them. I have currently have five Barracuda IVs, three IBM 60GXPs and two Maxtor D740Xs. Here's a breakdown of my experiences:
1)Drive temps without any airflow in front of them, from hottest to coolest:
Maxtor D740X - hottest
Barracuda IV - 2-3C less than Maxtor.
IBM 60GXP - 1C less than Seagate.
2)Drive temps with just a tiny bit (as little as 5-6cfm provided by 40mm fans 7-volted inside of mobile-racks) of airflow:
Maxtor - Hottest
IBM - 2-3C cooler than Maxtor
Barracuda - 2C cooler than IBM.
And I don't personally own any, but I had the chance to run a 120GB WDBB a few months ago and it was running 3-4C hotter than my cuda IVs with a little bit of cooling. This would put it between the IBM and Maxtor drives for heat.