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   1 What:           /sys/block/<disk>/stat
   2 Date:           February 2008
   3 Contact:        Jerome Marchand <jmarchan@redhat.com>
   4 Description:
   5                 The /sys/block/<disk>/stat files displays the I/O
   6                 statistics of disk <disk>. They contain 11 fields:
   7                  1 - reads completed succesfully
   8                  2 - reads merged
   9                  3 - sectors read
  10                  4 - time spent reading (ms)
  11                  5 - writes completed
  12                  6 - writes merged
  13                  7 - sectors written
  14                  8 - time spent writing (ms)
  15                  9 - I/Os currently in progress
  16                 10 - time spent doing I/Os (ms)
  17                 11 - weighted time spent doing I/Os (ms)
  18                 For more details refer Documentation/iostats.txt
  19
  20
  21 What:           /sys/block/<disk>/<part>/stat
  22 Date:           February 2008
  23 Contact:        Jerome Marchand <jmarchan@redhat.com>
  24 Description:
  25                 The /sys/block/<disk>/<part>/stat files display the
  26                 I/O statistics of partition <part>. The format is the
  27                 same as the above-written /sys/block/<disk>/stat
  28                 format.
  29
  30
  31 What:           /sys/block/<disk>/integrity/format
  32 Date:           June 2008
  33 Contact:        Martin K. Petersen <martin.petersen@oracle.com>
  34 Description:
  35                 Metadata format for integrity capable block device.
  36                 E.g. T10-DIF-TYPE1-CRC.
  37
  38
  39 What:           /sys/block/<disk>/integrity/read_verify
  40 Date:           June 2008
  41 Contact:        Martin K. Petersen <martin.petersen@oracle.com>
  42 Description:
  43                 Indicates whether the block layer should verify the
  44                 integrity of read requests serviced by devices that
  45                 support sending integrity metadata.
  46
  47
  48 What:           /sys/block/<disk>/integrity/tag_size
  49 Date:           June 2008
  50 Contact:        Martin K. Petersen <martin.petersen@oracle.com>
  51 Description:
  52                 Number of bytes of integrity tag space available per
  53                 512 bytes of data.
  54
  55
  56 What:           /sys/block/<disk>/integrity/write_generate
  57 Date:           June 2008
  58 Contact:        Martin K. Petersen <martin.petersen@oracle.com>
  59 Description:
  60                 Indicates whether the block layer should automatically
  61                 generate checksums for write requests bound for
  62                 devices that support receiving integrity metadata.