I would have lost all my data, but I had transferred it to one of the new RAIDs. The drive trundled on for a couple of days and didn't seem able to rebuild itself with the new hd. Then I bought a nice Seagate Barracuda drive that matched the specs of the existing drives perfectly. I found the specs of the old hds in the report on the Promise software. The sales guy said just buy any drive that will fit and the RAID would handle it. He referred me to sales saying he didn't know the specs. this didn't make a lot of sense to me as one of the drives failed so quickly. When my old R6 lost a drive after 3 years I called their technical assistance and they didn't know what specs I needed for the drives, but advised me to buy a $220 drive that the unit ships with. You need to be patient with Promise support.

The RAIDs are so fast, I suspect I can leave the videos on the RAID and get pretty much the same speed as the Mac disk. I put the applications and the video I'm working on on the 1 TB drive. Of course it is way too small to store movies, pictures, documents, etc, so I'm using one of the RAIDS as the main hard drive. They are nearly silent, fast as lightening, and much cooler than the R1 with 6 drives. I bought two of these to go with my late 2013 Mac Pro.

Pegasus2 r6 review