What: /proc/diskstats
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Date: February 2008
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Contact: Jerome Marchand <jmarchan@redhat.com>
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Description:
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The /proc/diskstats file displays the I/O statistics
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of block devices. Each line contains the following 14
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fields:
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1 - major number
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2 - minor mumber
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3 - device name
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4 - reads completed successfully
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5 - reads merged
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6 - sectors read
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7 - time spent reading (ms)
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8 - writes completed
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9 - writes merged
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10 - sectors written
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11 - time spent writing (ms)
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12 - I/Os currently in progress
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13 - time spent doing I/Os (ms)
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14 - weighted time spent doing I/Os (ms)
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Kernel 4.18+ appends four more fields for discard
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tracking putting the total at 18:
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15 - discards completed successfully
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16 - discards merged
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17 - sectors discarded
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18 - time spent discarding
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For more details refer to Documentation/iostats.txt
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