ext4 is failed me again! the most unstable fs tried to fix it by restoring block from backup, but without luck.. ```sh ↪ sudo fsck.ext4 -v /dev/sdd e2fsck 1.45.6 (20-Mar-2020) ext2fs_open2: Bad magic number in super-block fsck.ext4: Superblock invalid, trying backup blocks... fsck.ext4: Bad magic number in super-block while trying to open /dev/sdd 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/sdd contains DOS/MBR boot sector; partition 1 : ID=0xee, start-CHS (0x0,0,2), end-CHS (0x3ff,255,63), startsector 1, 4294967295 sectors, extended partition table (last) data ↪ sudo mke2fs -n /dev/sdd mke2fs 1.45.6 (20-Mar-2020) /dev/sdd contains DOS/MBR boot sector; partition 1 : ID=0xee, start-CHS (0x0,0,2), end-CHS (0x3ff,255,63), startsector 1, 4294967295 sectors, extended partition table (last) data Proceed anyway? (y,N) y Creating filesystem with 976754646 4k blocks and 244195328 inodes Filesystem UUID: 0e4124ad-a390-4c60-bb4a-4f7c48dac23b Superblock backups stored on blocks: 32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208, 4096000, 7962624, 11239424, 20480000, 23887872, 71663616, 78675968, 102400000, 214990848, 512000000, 550731776, 644972544 ↪ sudo e2fsck -b 32768 /dev/sdd e2fsck 1.45.6 (20-Mar-2020) e2fsck: Bad magic number in super-block while trying to open /dev/sdd 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/sdd contains DOS/MBR boot sector; partition 1 : ID=0xee, start-CHS (0x0,0,2), end-CHS (0x3ff,255,63), startsector 1, 429496725 sectors, extended partition table (last) data ``` i've tried blocks up to 11239424