sudo fsck -a /dev/sda
fsck лИли util-linux 2.35.1
fsck.ext2: Bad magic number in super-block while trying to open /dev/sda
/dev/sda:
The superblock could not be read or does not describe a valid ext2/ext3/ext4
filesystem.  If the device is valid and it really contains an ext2/ext3/ext4
filesystem (and not swap or ufs or something else), then the superblock
is corrupt, and you might try running e2fsck with an alternate superblock:
    e2fsck -b 8193 <device>
 or
    e2fsck -b 32768 <device>

/dev/sda contains `DOS/MBR boot sector; partition 1 : ID=0x83, start-CHS (0x4,4,1), end-CHS (0x3ff,254,2), startsector 2048, 3907026944 sectors' data
[ypp@ypp-pc ~]$ sudo fsck.ext4 -p /dev/sda
fsck.ext4: Bad magic number in super-block while trying to open /dev/sda
/dev/sda:
The superblock could not be read or does not describe a valid ext2/ext3/ext4
filesystem.  If the device is valid and it really contains an ext2/ext3/ext4
filesystem (and not swap or ufs or something else), then the superblock
is corrupt, and you might try running e2fsck with an alternate superblock:
    e2fsck -b 8193 <device>
 or
    e2fsck -b 32768 <device>

/dev/sda contains `DOS/MBR boot sector; partition 1 : ID=0x83, start-CHS (0x4,4,1), end-CHS (0x3ff,254,2), startsector 2048, 3907026944 sectors' data