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		 1 - major number
 9		 2 - minor mumber
10		 3 - device name
11		 4 - reads completed successfully
12		 5 - reads merged
13		 6 - sectors read
14		 7 - time spent reading (ms)
15		 8 - writes completed
16		 9 - writes merged
17		10 - sectors written
18		11 - time spent writing (ms)
19		12 - I/Os currently in progress
20		13 - time spent doing I/Os (ms)
21		14 - weighted time spent doing I/Os (ms)
22		For more details refer to Documentation/iostats.txt
 
 
 
 
 
 
 
 
 

 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