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mkfs_ext2.txt 7.1 KB

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  1. Difference between bbox mke2fs and standard one (dumpe2fs comparison):
  2. [upd: inode size has been fixed since then]
  3. Two significant differences:
  4. - standard mke2fs has resize_inode feature and thus has reserved GDT blocks,
  5. which decreases free blocks;
  6. - inode size: 128/256 (since 679807k is >0.5G, standard mke2fs uses "big" inodes)
  7. this affects inode table in block groups
  8. Filesystem volume name: <none> Filesystem volume name: <none>
  9. Last mounted on: <not available> Last mounted on: <not available>
  10. Filesystem UUID: f4839760-c89b-44b7-ac52-08b4e326c0b4 Filesystem UUID: 71179558-8c8e-4a56-ad54-018008f5c358
  11. Filesystem magic number: 0xEF53 Filesystem magic number: 0xEF53
  12. Filesystem revision #: 1 (dynamic) Filesystem revision #: 1 (dynamic)
  13. Filesystem features: ext_attr dir_index filetype sparse_super Filesystem features: ext_attr resize_inode dir_index filetype sparse_super large_file
  14. Filesystem flags: signed_directory_hash Filesystem flags: signed_directory_hash
  15. Default mount options: (none) Default mount options: (none)
  16. Filesystem state: clean Filesystem state: clean
  17. Errors behavior: Continue Errors behavior: Continue
  18. Filesystem OS type: Linux Filesystem OS type: Linux
  19. Inode count: 42624 Inode count: 42528
  20. Block count: 169951 Block count: 169951
  21. Reserved block count: 8497 Reserved block count: 8497
  22. Free blocks: 168594 Free blocks: 167103
  23. Free inodes: 42613 Free inodes: 42517
  24. First block: 0 First block: 0
  25. Block size: 4096 Block size: 4096
  26. Fragment size: 4096 Fragment size: 4096
  27. Reserved GDT blocks: 41
  28. Blocks per group: 32768 Blocks per group: 32768
  29. Fragments per group: 32768 Fragments per group: 32768
  30. Inodes per group: 7104 Inodes per group: 7088
  31. Inode blocks per group: 222 Inode blocks per group: 443
  32. Filesystem created: Wed Oct 21 13:40:55 2009 Filesystem created: Wed Oct 21 13:40:55 2009
  33. Last mount time: n/a Last mount time: n/a
  34. Last write time: Wed Oct 21 13:40:55 2009 Last write time: Wed Oct 21 13:40:55 2009
  35. Mount count: 0 Mount count: 0
  36. Maximum mount count: 20 Maximum mount count: 37
  37. Last checked: Wed Oct 21 13:40:55 2009 Last checked: Wed Oct 21 13:40:55 2009
  38. Check interval: 15552000 (6 months) Check interval: 15552000 (6 months)
  39. Next check after: Mon Apr 19 13:40:55 2010 Next check after: Mon Apr 19 13:40:55 2010
  40. Reserved blocks uid: 0 (user root) Reserved blocks uid: 0 (user root)
  41. Reserved blocks gid: 0 (group root) Reserved blocks gid: 0 (group root)
  42. First inode: 11 First inode: 11
  43. Inode size: 128 Inode size: 256
  44. Required extra isize: 28
  45. Desired extra isize: 28
  46. Default directory hash: half_md4 Default directory hash: half_md4
  47. Directory Hash Seed: ff94d047-c9ca-4fe5-b553-937a76101a89 Directory Hash Seed: c270fd43-9868-4a92-ae99-050098e12835
  48. Group 0: (Blocks 0-32767) Group 0: (Blocks 0-32767)
  49. Primary superblock at 0, Group descriptors at 1-1 Primary superblock at 0, Group descriptors at 1-1
  50. Reserved GDT blocks at 2-42
  51. Block bitmap at 2 (+2), Inode bitmap at 3 (+3) Block bitmap at 43 (+43), Inode bitmap at 44 (+44)
  52. Inode table at 4-225 (+4) Inode table at 45-487 (+45)
  53. 32537 free blocks, 7093 free inodes, 2 directories 32274 free blocks, 7077 free inodes, 2 directories
  54. Free blocks: 231-32767 Free blocks: 494-32767
  55. Free inodes: 12-7104 Free inodes: 12-7088
  56. Group 1: (Blocks 32768-65535) Group 1: (Blocks 32768-65535)
  57. Backup superblock at 32768, Group descriptors at 32769-32769 Backup superblock at 32768, Group descriptors at 32769-32769
  58. Reserved GDT blocks at 32770-32810
  59. Block bitmap at 32770 (+2), Inode bitmap at 32771 (+3) Block bitmap at 32811 (+43), Inode bitmap at 32812 (+44)
  60. Inode table at 32772-32993 (+4) Inode table at 32813-33255 (+45)
  61. 32542 free blocks, 7104 free inodes, 0 directories 32280 free blocks, 7088 free inodes, 0 directories
  62. Free blocks: 32994-65535 Free blocks: 33256-65535
  63. Free inodes: 7105-14208 Free inodes: 7089-14176
  64. Group 2: (Blocks 65536-98303) Group 2: (Blocks 65536-98303)
  65. Block bitmap at 65536 (+0), Inode bitmap at 65537 (+1) Block bitmap at 65536 (+0), Inode bitmap at 65537 (+1)
  66. Inode table at 65538-65759 (+2) Inode table at 65538-65980 (+2)
  67. 32544 free blocks, 7104 free inodes, 0 directories 32323 free blocks, 7088 free inodes, 0 directories
  68. Free blocks: 65760-98303 Free blocks: 65981-98303
  69. Free inodes: 14209-21312 Free inodes: 14177-21264
  70. ...