tests/f_detect_junk/expect

   1 *** e2fsck
   2 ext2fs_open2: Bad magic number in super-block
   3 ../e2fsck/e2fsck: Superblock invalid, trying backup blocks...
   4 ../e2fsck/e2fsck: Bad magic number in super-block while trying to open test.img
   5
   6 The superblock could not be read or does not describe a valid ext2/ext3/ext4
   7 filesystem.  If the device is valid and it really contains an ext2/ext3/ext4
   8 filesystem (and not swap or ufs or something else), then the superblock
   9 is corrupt, and you might try running e2fsck with an alternate superblock:
  10     e2fsck -b 8193 <device>
  11  or
  12     e2fsck -b 32768 <device>
  13
  14 test.img contains `PNG image data, 148 x 31, 8-bit/color RGBA, non-interlaced' data
  15 *** debugfs
  16 test.img: Bad magic number in super-block while opening filesystem
  17 test.img contains `PNG image data, 148 x 31, 8-bit/color RGBA, non-interlaced' data
  18 *** tune2fs
  19 ../misc/tune2fs: Bad magic number in super-block while trying to open test.img
  20 test.img contains `PNG image data, 148 x 31, 8-bit/color RGBA, non-interlaced' data
  21 *** mke2fs
  22 Creating filesystem with 16384 1k blocks and 4096 inodes
  23 Superblock backups stored on blocks:
  24         8193
  25