Western Digital My Book Pro Edition II dual-drive storage system offers RAID mirroring for extra peace of mind or RAID striping for extraordinary capacity and performance. Triple-interface and a powerful combination of features and performance make this system the storage solution of choice for creative professionals, workgroups, small offices and anyone looking for extra assurance that their data is safe.
Customer Rating: 



Review Summary: Western Digital 1 TB : secure backup, reasonably priced and quiet
Review: Received WD hard drive this afternoon. Installed Retrospect Express and RAID Manager the software that accompanies this hard drive. Backed up the 39 GB accumulated on the Imac G5's HD... 2.5 Hrs. The fan came on twice while I was in the room with it. The noise level was well within acceptable limits. I have the new hard drive setting about 3' from my right ear.
Western Digital has gotten some bad reviews in the past for loud fan noise. If this hard drive is an example of the current crop of WD HD's, then they have listened to the people's complaints and solved the problem.
The issue of overheating has also been mentioned in past reviews. To satisfy my curiosity I used a digital thermometer to record the temps around the outside of the well ventilated HD case. The range was from 81.1 to 96.2 taken over a two hour period. Most of the time the temperature was in the upper reaches of this range. The fan did not come on during that time period. As a comparison, the IMac G5 ran a maximum of 114.5 for the same period and its fan did not come on either. What this paragraph signifies: GIGO*.
Your estimate is as good as mine. Time will tell if these temperatures are within a range that insures long life to these hard drives.
A side issue is Retrospect Express: After the above backup was completed I had a window showing some execution errors between the originals and the copies. I went through the help menu they provided (CD based).
I will admit that I made a few reading errors; however, the relationship between their suggestions and the windows they provided for action (repair files) were confusing and awkward to use. Eventually ( I won't say how many hours) I stumbled my way to success. Could I reproduce the sequence that was successful? I doubt it. Suggestion: use the toll free support line and let them walk you through the procedures.
*Footnote: GIGO = Garbage in Garbage out