Thnx, michaaa62.

I tried with sudo su and i got this:
sh-3.2# ls -l /dev/disk/by-uuid
ls: /dev/disk/by-uuid: No such file or directory

I dont know about that app, but I tried with Disk Utility on "Nokia N900" (I dont think its the right disk/folder w /home, /opt) and it shows that everything is OK, and I cant use DiskWarrior, because Nokia N900 is fat32.