The tricky part it’s that you can have a valid file listing but corrupted file if disk order is not good.
I had to try all the disks permutation order anc check if the pdf file was corrupted or not; this is the good order:
```losetup --find --show disk1.imglosetup --find --show disk2.imgmdadm --create --assume-clean --level=5 --raid-devices=3 /dev/md0 /dev/loop1 missing /dev/loop0mount /dev/md0 /mnt/raidls -lah /mnt/raidtotal 4,1Mdrwxrwxrwx 2 root root    1,0K  8 avril 08:12 .drwxr-xr-x 1 root root      22 15 mai   22:14 ..-rwxrwxrwx 1 sky  lpadmin 4,1M  7 avril 18:44 imw_1337.pdf```The flag is in the pdf file