I have an older MPB, 2.33ghz running 10.4.11 with Parallels Desktop 3.0 running Vista on it, all of which has been running fine for a year or two. I also have an Imation Apollo external hard drive which I've been using for a few months. Today it won't mount in OS 10 and when I try to repair it using Disk Utility it says: Verify and Repair disk APOLLO ** /dev/disk1s1 ** Phase 1 - Read FAT ** Phase 2 - Check Cluster Chains ** Phase 3 - Checking Directories Unable to read directory (Input/output error) Error: The underlying task reported failure on exit It also says the format is MS-DOS File System (FAT32), which made me wonder if Windows messed it up- I think yesterday may have been the first time that I had the drive plugged in while also running the Vista VM. Windows didn't ask me to format it or anything and I believe this format should work on OS 10 and is probably how it came in the box, though I didn't check because it worked as soon as I plugged it in. However, the drive works perfectly on Vista and won't even mount on OS 10, which is irritating because I try and only use Windows when lives are at stake. So what happened? I feel like Windows hijacked my hard drive and I don't know what to do.