fsck
Context:
There are some issues when an external device has mounted to the host.
Some Research
# find which device
sudo fdisk -l
sudo umount <device>
sudo e2fsck -vfy /dev/sdb1
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Outputs:
Inode 11665412 extent tree (at level 2) could be narrower. Optimize? yes
Pass 1E: Optimizing extent trees
Pass 2: Checking directory structure
Pass 3: Checking directory connectivity
/lost+found not found. Create? yes
Pass 4: Checking reference counts
Pass 5: Checking group summary information
1.42.6-25426: ***** FILE SYSTEM WAS MODIFIED *****
397 inodes used (0.00%, out of 61046784)
0 non-contiguous files (0.0%)
0 non-contiguous directories (0.0%)
# of inodes with ind/dind/tind blocks: 0/0/0
Extent depth histogram: 258/81/49
227806906 blocks used (93.29%, out of 244181943)
0 bad blocks
131 large files
261 regular files
126 directories
0 character device files
0 block device files
0 fifos
0 links
0 symbolic links (0 fast symbolic links)
0 sockets
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387 files