Caution: do not upgrade to VMware vSphere 5.5 Update 1 if using NFS

UPDATE: VMware released a patch for this issue. See my post here for more info.

 

<update>VMware released KB2076392 ‘Frequent NFS APDs after upgrading ESXi to 5.5 U1 (2076392)

————————

On Twitter Nick Howell, a NetApp employee , warns VMware vSphere 5.5 customers not to upgrade to ESXi 5.5 Update 1. Because of a vSphere issue NFS disconnects are likely to happen.

This issue seems to occur with any NFS storage vendor, not just NetApp.

For NetApp customers the issue seems to occur when using Data ONTAP 8.0 7-Mode. Netapp is  investigating if this isuse occors on cDOT as well. 

According to Nick Howell, vSphere 5.5 Update 1 is not yet added to the NetApp Interoperability Matrix Tool which is a web-based utility. It enables you to search for information about the configurations for NetApp products that work with third-party products and components that meet the standards and requirements specified by NetApp.

Nothing more is known at the moment which can be shared externally. VMware and NetApp are aware of the issue.

VMware published a Knowledgebase article on this issue. The workaround is to use vSphere 5.5 GA

The error related to vSphere 5.5 Update 1 NFS shown in vCenter Server could be:

Device or filesystem with identifier <xxx> has entered the All Paths Down state.

The error is shown here.

Other bloggers reported as well on this issue.

Michael Webster: Heads Up Alert: vSphere 5.5 U1 NFS Random Disconnection Bug!

Nick Howell (who posted this alert first on Twitter)  NFS Disconnects in VMware vSphere 5.5 U1

Duncan Epping   Alert: vSphere 5.5 U1 and NFS issue!

There are other NetApp NFS connectivity issues on vSphere as described in this KB. This issue is related to MaxQueueDepth. datacenterdan.com has more info on this.

vsphere5.5-u1-caution

vsphere5.5nfsbug

some issues reported on Twitter

55nfs-issue1

55nfs-issues2

 

 

 

Advertisements

About Marcel van den Berg
I am a technical consultant with a strong focus on server virtualization, desktop virtualization, cloud computing and business continuity/disaster recovery.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

%d bloggers like this: