1What: /proc/diskstats 2Date: February 2008 3Contact: Jerome Marchand <jmarchan@redhat.com> 4Description: 5 The /proc/diskstats file displays the I/O statistics 6 of block devices. Each line contains the following 14 7 fields: 8 9 1 - major number 10 2 - minor mumber 11 3 - device name 12 4 - reads completed successfully 13 5 - reads merged 14 6 - sectors read 15 7 - time spent reading (ms) 16 8 - writes completed 17 9 - writes merged 18 10 - sectors written 19 11 - time spent writing (ms) 20 12 - I/Os currently in progress 21 13 - time spent doing I/Os (ms) 22 14 - weighted time spent doing I/Os (ms) 23 24 Kernel 4.18+ appends four more fields for discard 25 tracking putting the total at 18: 26 27 15 - discards completed successfully 28 16 - discards merged 29 17 - sectors discarded 30 18 - time spent discarding 31 32 For more details refer to Documentation/admin-guide/iostats.rst 33