Hi, I wouldn't blame Plan 9 for damaging another partition it shouldn't even touch. I'd blame ReiserFS. I heard several stories from friends and collegues who used ReiserFS about file system corruption. You might want to use your favorite search engine, but from my point of view ReiserFS isn't stable enough for everydays use. The alternatives are either called ext3 or jfs, I suppose. XFS is nice, too, but it tends to corrupt the file system in case of a sudden system crash (e.g. after power fail), especially on heavy loaded file systems.
Christian
