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!]