파일시스템 오류

다음과 같은 오류가 뜨는데요

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염치스럽지만 차근차근 설명 부탁드립니다.

EXT2-fs error (device sda1): ext2_readdir: bad page in #35717121
EXT2-fs error (device sda1): ext2_check_page: bad entry in directory #27099143: rec_len is smaller than minimal - offset=1703936, inode=0, rec_len=0, name_len=0
EXT2-fs error (device sda1): ext2_readdir: bad page in #27099143
EXT2-fs error (device sda1): ext2_check_page: bad entry in directory #35717121: directory entry across blocks - offset=8192, inode=855751089, rec_len=45324, name_len=226
EXT2-fs error (device sda1): ext2_readdir: bad page in #35717121
EXT2-fs error (device sda1): ext2_check_page: bad entry in directory #27099143: rec_len is smaller than minimal - offset=1703936, inode=0, rec_len=0, name_len=0
EXT2-fs error (device sda1): ext2_readdir: bad page in #27099143
EXT2-fs error (device sda1): ext2_check_page: bad entry in directory #35717121: directory entry across blocks - offset=8192, inode=855751089, rec_len=45324, name_len=226
EXT2-fs error (device sda1): ext2_readdir: bad page in #35717121
EXT2-fs error (device sda1): ext2_check_page: bad entry in directory #27099143: rec_len is smaller than minimal - offset=1703936, inode=0, rec_len=0, name_len=0
EXT2-fs error (device sda1): ext2_readdir: bad page in #27099143
EXT2-fs error (device sda1): ext2_check_page: bad entry in directory #35717121: directory entry across blocks - offset=8192, inode=855751089, rec_len=45324, name_len=226