Over the weekend, I had an email server RAID5 array fail. After bringing the array back online and running fsck, the entire /usr now how has 1 directory, lost+found. Inside the lost+found are hundreds of directories, of which very few contain anything. df - h still reveals /usr as having 24GB used. However most of this data does not appear to be visible. I would really like to recover these emails for my customers, but I do not know where to go from here, assuming it is even possible. I would appreciate any direction or advice.
Sample directory listing of /usr/lost+found
#05274997 #05648578 #05956413 #06287585 #06929083
#05274998 #05648580 #05956416 #06287586 #06929084
All of the directories look like this except for these 3: