Using this drive with RAID level 1 and Time Machine is an easy way to get backup storage you can trust for the Mac.
I prepared by downloading the latest driver from Western Digital and installing it instead of the driver on the CD. I turned off Time Machine so it wouldn’t prompt me to use the drive the first time I plugged it in.
When the drive arrived, I followed the instructions on the quick start card to change the drive to RAID level 1. (This uses the second drive for redundant storage. If a drive fails, you just pull it out and replace it, without losing data.) Then I turned on Time Machine and clicked Change Disk.
The WD drives in the enclosure are WD5000AAVS “Caviar Green” drives. The rotation speed varies depending on a number of factors, mostly to save power. That’s why the data sheet doesn’t specify 5400 or 7200 rpm.
I tested the heat issue by copying files for an hour and then opening the enclosure. The drives were almost too hot to touch. However, I don’t think this is an issue in practice, since the drives don’t normally need to run for such an extended period. I would rather have them quiet and redundant.
p/s : Content taken at amazon.com
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