Skip to main content
NetApp Knowledge Base

Performance issue on windows host due to faulty switch SFP

  1. Last updated
  2. Save as PDF
Views:
142
Visibility:
Public
Votes:
0
Category:
fabric-interconnect-and-management-switches
Specialty:
brocade
Last Updated:

Applies to

  • G6xx Brocade
  • E-series
  • Windows
  • FC

Issue

  • Users are facing read & write slowness on server which is connected to NetApp E-series storage through a brocade switch in between.
  • Windows server which is connected to brocade switch encountered below error message.
The IO operations at logical block address 0×14715xxxx for disk 2 (PDO name:\Device\MPIODisk0)was retried.
 
 
clipboard_e549a54fa7c06e72597f030ac9b2a74d0.png
  • On E-series end below FC link errors are observed in events.

Error Critical 135950 1207 Fibre channel link errors - threshold exceeded 0/0/0 Channel Host-side: controller in bay B, port 2 Controller in bay B true true true

  • Post analyzing the Brocade supportsave logs we could see that the low Tx is reported on port1 of switch is connected with impacted windows server.
RX Power:    -4.3    dBm (375.8uW)
TX Power:    -7.2    dBm (188.8 uW)
  • Low TX indicates the issue with SFP on the switch.

 

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.