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1What: /sys/block/<disk>/stat
2Date: February 2008
3Contact: Jerome Marchand <jmarchan@redhat.com>
4Description:
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
21What: /sys/block/<disk>/<part>/stat
22Date: February 2008
23Contact: Jerome Marchand <jmarchan@redhat.com>
24Description:
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
31What: /sys/block/<disk>/integrity/format
32Date: June 2008
33Contact: Martin K. Petersen <martin.petersen@oracle.com>
34Description:
35 Metadata format for integrity capable block device.
36 E.g. T10-DIF-TYPE1-CRC.
37
38
39What: /sys/block/<disk>/integrity/read_verify
40Date: June 2008
41Contact: Martin K. Petersen <martin.petersen@oracle.com>
42Description:
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
48What: /sys/block/<disk>/integrity/tag_size
49Date: June 2008
50Contact: Martin K. Petersen <martin.petersen@oracle.com>
51Description:
52 Number of bytes of integrity tag space available per
53 512 bytes of data.
54
55
56What: /sys/block/<disk>/integrity/write_generate
57Date: June 2008
58Contact: Martin K. Petersen <martin.petersen@oracle.com>
59Description:
60 Indicates whether the block layer should automatically
61 generate checksums for write requests bound for
62 devices that support receiving integrity metadata.