Skip to main content
NetApp Knowledge Base

Disk I/O Latency observed from E-Series

Views:
34
Visibility:
Public
Votes:
0
Category:
e-series-santricity-os-controller-software
Specialty:
esg
Last Updated:

Applies to

  • E-Series 11.70.4R1P1
  • VMware ESXi 8.0 update 3

Issue

  • Disk I/O Latency observed from E-Series.
  • Verify the StateCaptureData output to see the disk latency, in this case the ART latency for Read and Writes is less than 20ms.

-> luall 3
Initiator Read/Write Completions
....Logical Unit... :.................R E A D S................:...............W R I T E S................:
    Devnum Location :  #Success ByteXfered ART(uSec) MRT(uSec) :  #Success ByteXfered ART(uSec) MRT(uSec) :#Errs IO/s  BsyTm(milliSec)
---------- -------- :---------- ---------- --------- --------- :---------- ---------- --------- --------- :----- ----- ---------------
  00000100   c,s1   :       177     181248       484         0 :         0          0         0         0 :    0  2058              86
  00000101   c,s0   :       177     181248       484         0 :         0          0         0         0 :    0     0               0
  00000102   c,s0   :       177     181248       484         0 :         0          0         0         0 :    0     0               0
  00010000 t99,s1   :   2349509 208517434880     14382    430442 :   1052067 86687051776     18213    435265 :    0   202        16793072
  00010001 t99,s2   :   2342729 209027882496     15083    614163 :   1046102 86585397248     19076    387065 :    0   197        17152697
  00010003 t99,s4   :   2342514 208478775296     14697    613637 :   1043458 86595710976     18874    312839 :    0   200        16916557
  00010004 t99,s5   :   2343162 209068365312     15020    248777 :   1046045 86560362496     19631    268908 :    0   197        17142800
  00010006 t99,s7   :     80497 10401934848       848     28284 :    263277 34349726208      7108     92419 :    0   378          908583
  00010007 t99,s8   :     80106 10401655296       817     21674 :    262603 34339923456      7444    158946 :    0   340         1005014
  00010009 t99,s10  :     80342 10404988416       841     20047 :    262813 34356277760      7644     55777 :    0   344          995157
  0001000a t99,s11  :     80494 10400684032       865     27136 :    262675 34340553216      7090     58844 :    0   391          876054
  0001000c t99,s13  :   2336994 208925081600     14788    625254 :   1043377 86618030080     19390    421266 :    0   198        17014104
  0001000d t99,s14  :   2346704 208480396288     14832    450157 :   1047482 86575374336     18830    545047 :    0   200        16944228
  0001000f t99,s16  :   2334784 208940946944     14765    614440 :   1037064 86509182976     19331    249560 :    0   198        16996054
  00010010 t99,s17  :   2348841 208554997248     14993    568347 :   1045910 86547570688     19281    313024 :    0   199        17034473
  00010012 t99,s19  :     80129 10398984704       839     15522 :    262639 34337087488      6901     53658 :    0   388          882365
  00010013 t99,s20  :     81392 10420002816       929     38551 :    263999 34386511360      6763     74990 :    0   401          859259
  00010015 t99,s22  :     80576 10406485504       826     16190 :    262810 34349173760      6968     94589 :    0   383          894791
  00010016 t99,s23  :     80775 10413562368       898     30660 :    263718 34376651776      6913    219638 :    0   395          870069

  • Check the firmware version of Disk and controller, compare it using the IMT.
  • In this case, Disk firmware was not on latest, Controller firmware was not compatible with Host firmware.

 

Sign in to view the entire content of this KB article.

New to NetApp?

Learn more about our award-winning Support

NetApp provides no representations or warranties regarding the accuracy or reliability or serviceability of any information or recommendations provided in this publication or with respect to any results that may be obtained by the use of the information or observance of any recommendations provided herein. The information in this document is distributed AS IS and the use of this information or the implementation of any recommendations or techniques herein is a customer's responsibility and depends on the customer's ability to evaluate and integrate them into the customer's operational environment. This document and the information contained herein may be used solely in connection with the NetApp products discussed in this document.