Yea, I think I ran into that bug. My FFS drive is unvalidated and it won't re-validate. I think the drive is failing too. Any sustained disk activity (long sequential read or scan of the drive) will cause the drive to lock up.
I am trying to copy the data off of this drive as I type this and every time I try to copy data from a directory that has a sub-directory containing 100 or more files, the copy slows down to a crawl. I end up aborting the copy, moving down into the sub-directory and copying the files in smaller batches. Pain in the behind but it is working. Taking me forever though.