mount : wrong fs type, bad option, bad superblock on /dev/sda3
file system오류인 경우에 나타나는 증상입니다.
응급 대처 방법은 해당 OS시디를 넣고 rescue모드로 접속하여
fsck.ext3 /dev/sda3
주루루루루룩 나옵니다.
e2fsck 1.35 (28-Feb-2015)
Couldn't find ext2 superblock, trying backup blocks...
Resize inode not valid. Recreate<y>? yes 뭐 물어보면 y 때리세요
/home was not cleanly unmounted, check forced.
Pass 1: Checking inodes, blocks, and sizes
Pass 2: Checking directory structure
Pass 3: Checking directory connectivity
Pass 4: Checking reference counts
Pass 5: Checking group summary information
Free blocks count wrong for group #2 (32286, counted=32278).
Fix<y>? yes
Free blocks count wrong for group #11 (32286, counted=32278).
Fix<y>? yes
Free blocks count wrong (414144, counted=414128).
Fix<y>? yes
Free inodes count wrong for group #0 (15345, counted=15344).
Fix<y>? yes
Free inodes count wrong for group #2 (15360, counted=15352).
Fix<y>? yes
Directories count wrong for group #2 (0, counted=1).
Fix<y>? yes
Free inodes count wrong for group #11 (15360, counted=15352).
Fix<y>? yes
Directories count wrong for group #11 (0, counted=1).
Fix<y>? yes
Free inodes count wrong (215025, counted=215008).
Fix<y>? yes
재부팅 끝!
출처: https://sunghyun8782.tistory.com/4?category=653112 [배워보자!]