$cat/proc/diskstats
……
80sda1307671204781992848404253865895766…
81sda158740159896204009696
82sda2403132632496450214236939485273723…
83sda314232614030865538334302764…
84sda410230000033
85sda557717830420835941525772023051…
86sda63283617126914185361965077…
87sda7311062134816400000121164
88sda863475106711704463645571050986…
89sda94091423445421415796162614979…
810sda1030352166813000000125130
……
Field1—#ofreadscompleted
Thisisthetotalnumberofreadscompletedsuccessfully.
Field2—#ofreadsmerged,field6—#ofwritesmerged
Readsandwriteswhichareadjacenttoeachothermaybemergedfor
efficiency.Thustwo4Kreadsmaybecomeone8Kreadbeforeitis
ultimatelyhandedtothedisk,andsoitwillbecounted(andqueued)
asonlyoneI/O.Thisfieldletsyouknowhowoftenthiswasdone.
Field3—#ofsectorsread
Thisisthetotalnumberofsectorsreadsuccessfully.
Field4—#ofmillisecondsspentreading
Thisisthetotalnumberofmillisecondsspentbyallreads(as
measuredfrom__make_request()toend_that_request_last()).
Field5—#ofwritescompleted
Thisisthetotalnumberofwritescompletedsuccessfully.
Field7—#ofsectorswritten
Thisisthetotalnumberofsectorswrittensuccessfully.
Field8—#ofmillisecondsspentwriting
Thisisthetotalnumberofmillisecondsspentbyallwrites(as
measuredfrom__make_request()toend_that_request_last()).
Field9—#ofI/Oscurrentlyinprogress
Theonlyfieldthatshouldgotozero.Incrementedasrequestsare
giventoappropriatestructrequest_queueanddecrementedastheyfinish.
Field10—#ofmillisecondsspentdoingI/Os
Thisfieldisincreasessolongasfield9isnonzero.
Field11—weighted#ofmillisecondsspentdoingI/Os
ThisfieldisincrementedateachI/Ostart,I/Ocompletion,I/O
merge,orreadofthesestatsbythenumberofI/Osinprogress
(field9)timesthenumberofmillisecondsspentdoingI/Osincethe
lastupdateofthisfield.Thiscanprovideaneasymeasureofboth
I/Ocompletiontimeandthebacklogthatmaybeaccumulating.
$linuxmon.bindisk=emcpower
…ReadRTimWritWTimBusyTime
…700570039
…650550040
…100016200112
…700570036
…650700064
…760550033
…1052980074
…650540038
…15501020085
…760630049
…640540038
…530340022
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