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extundelete --superblock and dumpe2fs -h

Apr 8th, 2017
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  1. [amygdala@localhost recover]$ sudo extundelete --superblock /dev/sdc1
  2. NOTICE: Extended attributes are not restored.
  3. Inodes count: 244195328
  4. Blocks count: 976754385
  5. Reserved blocks count: 48837719
  6. Free blocks count: 961366710
  7. Free inodes count: 244195057
  8. First Data Block: 0
  9. Block size: 4096
  10. Fragment size: 4096
  11. # Blocks per group: 32768
  12. # Fragments per group: 1
  13. # Inodes per group: 8192
  14. Mount time: 1491685137
  15. Write time: 1491687016
  16. Mount count: 2
  17. Maximal mount count: -1
  18. Magic signature: 61267
  19. File system state: 1
  20. Behaviour when detecting errors: 1
  21. minor revision level: 0
  22. time of last check: 1491684974
  23. max. time between checks: 0
  24. OS: 0
  25. Revision level: 1
  26. Default uid for reserved blocks: 0
  27. Default gid for reserved blocks: 0
  28. First non-reserved inode: 11
  29. size of inode structure: 256
  30. block group # of this superblock: 0
  31. compatible feature set: 60
  32. incompatible feature set: 706
  33. readonly-compatible feature set: 123
  34. 128-bit uuid for volume: 1a09452fb360430d9e0552e685be5f74
  35. For compression: 0
  36. Nr to preallocate for dirs: 0
  37. Per group table for online growth: 1024
  38. uuid of journal superblock: 00000000000000000000000000000000
  39. inode number of journal file: 8
  40. device number of journal file: 0
  41. start of list of inodes to delete: 0
  42. HTREE hash seed: b1a99d2a384916a0aedb4d96181a6c00
  43. Default hash version to use: 1
  44. Default type of journal backup: 1
  45. First metablock group: 0
  46. When the filesystem was created: 1491684974
  47. Compatible feature set: HAS_JOURNAL EXT_ATTR RESIZE_INODE DIR_INDEX
  48. Incompatible feature set: FILETYPE
  49. Read only compatible feature set: SPARSE_SUPER LARGE_FILE
  50.  
  51. [amygdala@localhost recover]$ sudo dumpe2fs -h /dev/sdc1
  52. dumpe2fs 1.42.9 (28-Dec-2013)
  53. Filesystem volume name: <none>
  54. Last mounted on: /mnt/4tb
  55. Filesystem UUID: 1a09452f-b360-430d-9e05-52e685be5f74
  56. Filesystem magic number: 0xEF53
  57. Filesystem revision #: 1 (dynamic)
  58. Filesystem features: has_journal ext_attr resize_inode dir_index filetype extent 64bit flex_bg sparse_super large_file huge_file uninit_bg dir_nlink extra_isize
  59. Filesystem flags: signed_directory_hash
  60. Default mount options: user_xattr acl
  61. Filesystem state: clean
  62. Errors behavior: Continue
  63. Filesystem OS type: Linux
  64. Inode count: 244195328
  65. Block count: 976754385
  66. Reserved block count: 48837719
  67. Free blocks: 961366710
  68. Free inodes: 244195057
  69. First block: 0
  70. Block size: 4096
  71. Fragment size: 4096
  72. Group descriptor size: 64
  73. Reserved GDT blocks: 1024
  74. Blocks per group: 32768
  75. Fragments per group: 32768
  76. Inodes per group: 8192
  77. Inode blocks per group: 512
  78. Flex block group size: 16
  79. Filesystem created: Sat Apr 8 16:56:14 2017
  80. Last mount time: Sat Apr 8 16:58:57 2017
  81. Last write time: Sat Apr 8 17:30:16 2017
  82. Mount count: 2
  83. Maximum mount count: -1
  84. Last checked: Sat Apr 8 16:56:14 2017
  85. Check interval: 0 (<none>)
  86. Lifetime writes: 143 GB
  87. Reserved blocks uid: 0 (user root)
  88. Reserved blocks gid: 0 (group root)
  89. First inode: 11
  90. Inode size: 256
  91. Required extra isize: 28
  92. Desired extra isize: 28
  93. Journal inode: 8
  94. Default directory hash: half_md4
  95. Directory Hash Seed: 2a9da9b1-a016-4938-964d-dbae006c1a18
  96. Journal backup: inode blocks
  97. Journal features: journal_incompat_revoke journal_64bit
  98. Journal size: 128M
  99. Journal length: 32768
  100. Journal sequence: 0x00000171
  101. Journal start: 0
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