Purpose of last+found Directory

1) last+found it will store corrupted or damage files when the unclean Power failure occur or system shutdown occur.

2) When we create the ext3 file system. 'lost+found' directory is created.
Under these directory if any of the file has been damaged or crash the files will be store under 'lost+found'.

3) After the unclean or power failure of the system when the system boot it will check the fsck command.
last+found Directory ext3 file system in Linux.
Whenever we create new file system under linux /Unix it will create lost+found directory, it will be used for file system check & repair fsck utility.

Note: When the file system is mounted, we can't used fsck command.