Jerome Fine replies: There might be a way to recover some of the files and depending on the state of the directory, almost all of the files that you have modified. But, I would need a lot of information, probably a file with the contents of the first 68 blocks on the DU2: unit. So don't despair as yet. 1. Create a 68 block file on the good unit that you can still boot from: CREATE DU2.DIR[68] 2. Make it a logical MOUNT LD2: DU2.DIR 3. Copy the first 68 blocks of DU2: to the logical COPY/DEV DU2:/START:0./END:67. LD2:/START:0. 4. Compare the logical and DU2: to be absolutely sure. DIFF/BIN/DEV DU2: LD2: 5. Send me the file DU2.DIR via e-mail You probably do not need the full 68 blocks since it was very doubtful that you ever used that many. If you know anything about the structure of a directory, then do a: DUMP/TERM DU2: and note where the directory information stops. The block numbers are in octal and the dump is in octal. Even if you know next to nothing (or even nothing), you should be able to separate out directory information from junk or format. The directory proper starts at block 6. If the directory is (almost certainly) smaller than 31 segments, then adjust the size of the file that you set up as a logical accordingly. If you need more information, please ask. One thing this exercise will do is to determine if there are any unreadable blocks as opposed to blocks with bad data. It is possible that only BLOCK 1 (2nd block on DU2:) is bad (unlikely) and the actual directory is GOOD. Sincerely yours, Jerome Fine