1 mke2fs -F -O resize_inode -o Linux -b 1024 -g 1024 test.img 16384 2 Filesystem label= 3 OS type: Linux 4 Block size=1024 (log=0) 5 Fragment size=1024 (log=0) 6 4096 inodes, 16384 blocks 7 819 blocks (5.00%) reserved for the super user 8 First data block=1 9 Maximum filesystem blocks=8421376 10 16 block groups 11 1024 blocks per group, 1024 fragments per group 12 256 inodes per group 13 Superblock backups stored on blocks: 14 1025, 3073, 5121, 7169, 9217 15 16 Writing inode tables: 0/16 1/16 2/16 3/16 4/16 5/16 6/16 7/16 8/16 9/1610/1611/1612/1613/1614/1615/16done 17 Writing superblocks and filesystem accounting information: done 18 19 Pass 1: Checking inodes, blocks, and sizes 20 Pass 2: Checking directory structure 21 Pass 3: Checking directory connectivity 22 Pass 4: Checking reference counts 23 Pass 5: Checking group summary information 24 test_filesys: 11/4096 files (0.0% non-contiguous), 2107/16384 blocks 25 Exit status is 0 26 ----------------------------------------------- 27 28 debugfs -R ''set_inode_field <7> block[2] 42'' -w ./test.img 29 Exit status is 0 30 Resize inode not valid. Recreate? yes 31 32 Pass 1: Checking inodes, blocks, and sizes 33 Pass 2: Checking directory structure 34 Pass 3: Checking directory connectivity 35 Pass 4: Checking reference counts 36 Pass 5: Checking group summary information 37 Free blocks count wrong for group #0 (717, counted=718). 38 Fix? yes 39 40 Free blocks count wrong (14276, counted=14277). 41 Fix? yes 42 43 44 test_filesys: ***** FILE SYSTEM WAS MODIFIED ***** 45 test_filesys: 11/4096 files (0.0% non-contiguous), 2107/16384 blocks 46 Exit status is 1 47 Pass 1: Checking inodes, blocks, and sizes 48 Pass 2: Checking directory structure 49 Pass 3: Checking directory connectivity 50 Pass 4: Checking reference counts 51 Pass 5: Checking group summary information 52 test_filesys: 11/4096 files (0.0% non-contiguous), 2107/16384 blocks 53 Exit status is 0 54 ----------------------------------------------- 55 56 debugfs -R ''clri <7>'' -w ./test.img 57 Exit status is 0 58 Resize inode not valid. Recreate? yes 59 60 Pass 1: Checking inodes, blocks, and sizes 61 Pass 2: Checking directory structure 62 Pass 3: Checking directory connectivity 63 Pass 4: Checking reference counts 64 Pass 5: Checking group summary information 65 Free blocks count wrong for group #0 (717, counted=718). 66 Fix? yes 67 68 Free blocks count wrong (14276, counted=14277). 69 Fix? yes 70 71 72 test_filesys: ***** FILE SYSTEM WAS MODIFIED ***** 73 test_filesys: 11/4096 files (0.0% non-contiguous), 2107/16384 blocks 74 Exit status is 1 75 Pass 1: Checking inodes, blocks, and sizes 76 Pass 2: Checking directory structure 77 Pass 3: Checking directory connectivity 78 Pass 4: Checking reference counts 79 Pass 5: Checking group summary information 80 test_filesys: 11/4096 files (0.0% non-contiguous), 2107/16384 blocks 81 Exit status is 0 82 ----------------------------------------------- 83 84 debugfs -R ''set_inode_field <7> bmap[524] 57'' -w ./test.img 85 Exit status is 0 86 Resize inode not valid. Recreate? yes 87 88 Pass 1: Checking inodes, blocks, and sizes 89 Pass 2: Checking directory structure 90 Pass 3: Checking directory connectivity 91 Pass 4: Checking reference counts 92 Pass 5: Checking group summary information 93 Free blocks count wrong for group #0 (717, counted=718). 94 Fix? yes 95 96 Free blocks count wrong (14276, counted=14277). 97 Fix? yes 98 99 100 test_filesys: ***** FILE SYSTEM WAS MODIFIED ***** 101 test_filesys: 11/4096 files (0.0% non-contiguous), 2107/16384 blocks 102 Exit status is 1 103 Pass 1: Checking inodes, blocks, and sizes 104 Pass 2: Checking directory structure 105 Pass 3: Checking directory connectivity 106 Pass 4: Checking reference counts 107 Pass 5: Checking group summary information 108 test_filesys: 11/4096 files (0.0% non-contiguous), 2107/16384 blocks 109 Exit status is 0 110 ----------------------------------------------- 111 112 debugfs -R ''set_super_value reserved_gdt_blocks 15679'' -w ./test.img 113 Exit status is 0 114 Corruption found in superblock. (reserved_gdt_blocks = 15679). 115 116 The superblock could not be read or does not describe a correct ext2 117 filesystem. If the device is valid and it really contains an ext2 118 filesystem (and not swap or ufs or something else), then the superblock 119 is corrupt, and you might try running e2fsck with an alternate superblock: 120 e2fsck -b 1025 <device> 121 122 Exit status is 8 123 ----------------------------------------------- 124 125 debugfs -R ''set_super_value reserved_gdt_blocks 32'' -w ./test.img 126 Exit status is 0 127 Pass 1: Checking inodes, blocks, and sizes 128 Pass 2: Checking directory structure 129 Pass 3: Checking directory connectivity 130 Pass 4: Checking reference counts 131 Pass 5: Checking group summary information 132 Block bitmap differences: -(35--258) -(1059--1282) -(3107--3330) -(5155--5378) -(7203--7426) -(9251--9474) 133 Fix? yes 134 135 Free blocks count wrong for group #0 (718, counted=942). 136 Fix? yes 137 138 Free blocks count wrong for group #1 (732, counted=956). 139 Fix? yes 140 141 Free blocks count wrong for group #3 (732, counted=956). 142 Fix? yes 143 144 Free blocks count wrong for group #5 (732, counted=956). 145 Fix? yes 146 147 Free blocks count wrong for group #7 (732, counted=956). 148 Fix? yes 149 150 Free blocks count wrong for group #9 (732, counted=956). 151 Fix? yes 152 153 Free blocks count wrong (14277, counted=15621). 154 Fix? yes 155 156 157 test_filesys: ***** FILE SYSTEM WAS MODIFIED ***** 158 test_filesys: 11/4096 files (0.0% non-contiguous), 763/16384 blocks 159 Exit status is 1 160 Pass 1: Checking inodes, blocks, and sizes 161 Pass 2: Checking directory structure 162 Pass 3: Checking directory connectivity 163 Pass 4: Checking reference counts 164 Pass 5: Checking group summary information 165 test_filesys: 11/4096 files (0.0% non-contiguous), 763/16384 blocks 166 Exit status is 0 167
