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Sep 25th, 2017
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  1. $ btrfs filesystem show /mnt/pool
  2. Label: 'pool_16-03' uuid: 59301fea-434a-4c43-bb45-xxxxxxxxxxxx
  3. Total devices 7 FS bytes used 3.97TiB
  4. devid 1 size 931.51GiB used 561.00GiB path /dev/mapper/WD-WCAU453xxxxx
  5. devid 3 size 1.82TiB used 1.46TiB path /dev/mapper/WD-WCAZAF8xxxxx
  6. devid 4 size 931.51GiB used 561.00GiB path /dev/mapper/WD-WCC4J7Axxxxx
  7. devid 5 size 1.82TiB used 1.46TiB path /dev/mapper/WD-WCC4M2Sxxxxx
  8. devid 6 size 1.82TiB used 1.46TiB path /dev/mapper/WD-WMC4M0Hxxxxx
  9. devid 7 size 931.51GiB used 560.03GiB path /dev/mapper/S1DGxxxx
  10. devid 8 size 2.73TiB used 2.37TiB path /dev/mapper/WD-WCC4N3Pxxxxx
  11.  
  12. $ btrfs device stats /mnt/pool
  13. [/dev/mapper/WD-WCAU453xxxxx].write_io_errs 0
  14. [/dev/mapper/WD-WCAU453xxxxx].read_io_errs 0
  15. [/dev/mapper/WD-WCAU453xxxxx].flush_io_errs 0
  16. [/dev/mapper/WD-WCAU453xxxxx].corruption_errs 0
  17. [/dev/mapper/WD-WCAU453xxxxx].generation_errs 0
  18. [/dev/mapper/WD-WCAZAF8xxxxx].write_io_errs 0
  19. [/dev/mapper/WD-WCAZAF8xxxxx].read_io_errs 0
  20. [/dev/mapper/WD-WCAZAF8xxxxx].flush_io_errs 0
  21. [/dev/mapper/WD-WCAZAF8xxxxx].corruption_errs 0
  22. [/dev/mapper/WD-WCAZAF8xxxxx].generation_errs 0
  23. [/dev/mapper/WD-WCC4J7Axxxxx].write_io_errs 0
  24. [/dev/mapper/WD-WCC4J7Axxxxx].read_io_errs 0
  25. [/dev/mapper/WD-WCC4J7Axxxxx].flush_io_errs 0
  26. [/dev/mapper/WD-WCC4J7Axxxxx].corruption_errs 0
  27. [/dev/mapper/WD-WCC4J7Axxxxx].generation_errs 0
  28. [/dev/mapper/WD-WCC4M2Sxxxxx].write_io_errs 0
  29. [/dev/mapper/WD-WCC4M2Sxxxxx].read_io_errs 0
  30. [/dev/mapper/WD-WCC4M2Sxxxxx].flush_io_errs 0
  31. [/dev/mapper/WD-WCC4M2Sxxxxx].corruption_errs 0
  32. [/dev/mapper/WD-WCC4M2Sxxxxx].generation_errs 0
  33. [/dev/mapper/WD-WMC4M0Hxxxxx].write_io_errs 0
  34. [/dev/mapper/WD-WMC4M0Hxxxxx].read_io_errs 0
  35. [/dev/mapper/WD-WMC4M0Hxxxxx].flush_io_errs 0
  36. [/dev/mapper/WD-WMC4M0Hxxxxx].corruption_errs 0
  37. [/dev/mapper/WD-WMC4M0Hxxxxx].generation_errs 0
  38. [/dev/mapper/S1DGxxxx].write_io_errs 0
  39. [/dev/mapper/S1DGxxxx].read_io_errs 0
  40. [/dev/mapper/S1DGxxxx].flush_io_errs 0
  41. [/dev/mapper/S1DGxxxx].corruption_errs 0
  42. [/dev/mapper/S1DGxxxx].generation_errs 0
  43. [/dev/mapper/WD-WCC4N3Pxxxxx].write_io_errs 0
  44. [/dev/mapper/WD-WCC4N3Pxxxxx].read_io_errs 0
  45. [/dev/mapper/WD-WCC4N3Pxxxxx].flush_io_errs 0
  46. [/dev/mapper/WD-WCC4N3Pxxxxx].corruption_errs 0
  47. [/dev/mapper/WD-WCC4N3Pxxxxx].generation_errs 0
  48.  
  49. $ btrfs inspect-internal dump-super /dev/mapper/WD-WCAU453xxxxx
  50. superblock: bytenr=65536, device=/dev/mapper/WD-WCAU453xxxxx
  51. ---------------------------------------------------------
  52. csum_type 0 (crc32c)
  53. csum_size 4
  54. csum 0xe9d022b3 [match]
  55. bytenr 65536
  56. flags 0x1
  57. ( WRITTEN )
  58. magic _BHRfS_M [match]
  59. fsid 59301fea-434a-4c43-bb45-xxxxxxxxxxxx
  60. label pool_16-03
  61. generation 607586
  62. root 13663415369728
  63. sys_array_size 258
  64. chunk_root_generation 603897
  65. root_level 1
  66. chunk_root 13663863832576
  67. chunk_root_level 1
  68. log_root 0
  69. log_root_transid 0
  70. log_root_level 0
  71. total_bytes 12002382364160
  72. bytes_used 4361842671616
  73. sectorsize 4096
  74. nodesize 16384
  75. leafsize (deprecated) 16384
  76. stripesize 4096
  77. root_dir 6
  78. num_devices 7
  79. compat_flags 0x0
  80. compat_ro_flags 0x0
  81. incompat_flags 0x361
  82. ( MIXED_BACKREF |
  83. BIG_METADATA |
  84. EXTENDED_IREF |
  85. SKINNY_METADATA |
  86. NO_HOLES )
  87. cache_generation 607586
  88. uuid_tree_generation 607586
  89. dev_item.uuid a9b2e4ea-404c-4c98-a450-xxxxxxxxxxxx
  90. dev_item.fsid 59301fea-434a-4c43-bb45-xxxxxxxxxxxx [match]
  91. dev_item.type 0
  92. dev_item.total_bytes 1000201740288
  93. dev_item.bytes_used 602369163264
  94. dev_item.io_align 4096
  95. dev_item.io_width 4096
  96. dev_item.sector_size 4096
  97. dev_item.devid 1
  98. dev_item.dev_group 0
  99. dev_item.seek_speed 0
  100. dev_item.bandwidth 0
  101. dev_item.generation 0
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