Hi all, Apologies in advance if this post is in the wrong place, I'm just desperate for help here. I've got limited space on my iMac's internal HDD, so I've been using a Lacie 2Big external drive as the primary location for my files. I had it set up in a Raid 1 structure, which I thought would protect me from disk failure. I came home on Saturday night to a message on my iMac that my external drive had not been properly ejected (nobody was home, so this happened without a person involved). From that point on, I have not been able to get the drive to mount to the iMac. After reading several forum discussions, I figured it was a power supply issue and ordered a replacement from Lacie. It arrived today and my problem is not fixed. Tech support is now telling me that my hard drive has been corrupted and I'll need data recovery services to get my files back. My first question: how does this happen? Why isn't a Raid 1 set up enough to protect me from disk failure? I'm not a back up expert but I thought I was taking the right step to insure my data. Was I wrong? Should I get another opinion (could Lacie be wrong - is there another potential issue at play here)? I just thought that if one drive failed, the other one would have a back up waiting for me, but it seems as though neither drive is functional at this point. I can see the structure in System Information under the Thunderbolt tree but not in Disk Utility (and it won't mount). My second question: have any of you had success with data recovery in the past? If any of you are in the Chicago area, do you have a local service provider that you can recommend? I need these files back - my wedding pictures, honeymoon pictures, video of my proposal to my wife, pictures of my deceased father, etc. I don't have these stored anywhere else. Any advice is greatly appreciated. Thanks!