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SQL or other outage during Cluster Switch Upgrade

Last Updated:

Applies to

  • Cisco Nexus 3132 Cluster Switch
  • Cisco Nexus 3232 Cluster Switch


  • During an upgrade of a cluster switch for future expansion, an outage takes place because of loss of network connectivity.
  • Example: A SQL error is seen in the Windows Event Viewer of the SQL server:

The IO operation at logical block address 0x2fa2da1 for Disk 0 (PDO name: \Device\00000030) was retried.
Event Xml:
<Event xmlns="">
    <Provider Name="disk" />
    <EventID Qualifiers="32772">153</EventID>
    <TimeCreated SystemTime="2021-03-03T06:27:12.317465000Z" />
    <Security />


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