Still a noob, so perhaps there is a page somewhere with this information, but:
I had a couple of machines in my cloud go down - not at the same time I don't think - and they showed up as dead nodes. I bounced the cloud and ran fsck, which showed a number of 1- and a couple 2- missing blocks for a number of files. It also said my dfs is corrupted (I assume by the missing blocks). I've had replication to 3 (12 nodes), and none of the missing block counts is >2 so I wonder "Are my files hosed?" If they are it is not a catastrophe, since I have the originals, but I've looked for fsck documentation and not found an answer. I then tried fsck / -move, which is advertised to move corrupted files to /lost+found. It printed out a number of file entries and varying ... afterwards, but there is no /lost+found directory to be found. When I run fsck / -files again I get the same listing of many good files and some that are missing 1-2 blocks. I thought I would ask for help before I fsck / -delete to see what will happen. Jeff