Cluster Shared Volumes (CSV) in redirected access mode after installing McAfee VSE 8.7 Patch 5 or 8.8 Patch 1

Cluster Shared Volumes (CSV) in redirected access mode after installing McAfee VSE 8.7 Patch 5 or 8.8 Patch 1

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There is an issue with Cluster Shared Volumes and McAfee VirusScan Enterprise that I wanted to pass along.  When installing McAfee VSE 8.7 Patch 5 or 8.8 Patch 1, the CSV drives will go into redirected mode and will not go out of it.

The reason for this is that the McAfee filter driver (mfehidk.sys) is using decimal points in the altitude to help in identifying upgrade scenarios for their product.  The Cluster CSV filter only accepts whole numbers and puts the drives in redirected access mode when it sees this decimal value.

When seeing this, if you run FLTMC from an administrative command prompt, you may see something similar too:

C:\> fltmc

Filter Name    Num Instances      Altitude    Frame
------------------------------------------------------
CSVFilter            2            404900        0
mfehidk                           329998.99   <Legacy>
mfehidk              2            321300.00     0

If you were to generate a Cluster Log, you would see the below identifying that it cannot read the altitude value properly.

INFO [DCM] FsFilterCanUseDirectIO is called for \\?\Volume{188c44f1-9cd0-11df-926b-a4ca2baf36ff}\
ERR  mscs::FilterSnooper::CanUseDirectIO: BadFormat(5917)' because of 'non-digit found'
INFO [DCM] PostOnline. CanUseDirectIO for C2V1 => false

McAfee has released the following document giving a temporary workaround.

Cluster Shared Volumes (CSV) status becomes Online (Redirected access)
https://kc.mcafee.com/corporate/index?page=content&id=KB73596

Microsoft is aware of the problem and currently working on a fix.  When this fix is available, this will be updated and a new KB Article will be created with the fix.

John Marlin
Senior Support Escalation Engineer
Microsoft Enterprise Platforms Support

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  • Hi,

    We are currently experiencing this exact problem, is there an update, or somewhere I should check back for where the update will appear when it is?

    Thank you. :)

  • John - faced the same problem. Has Microsoft came up with a fix or KB.

  • Microsoft has released a fix for this now.

    2674551

    Redirected mode is enabled unexpectedly in a Cluster Shared Volume when you are running a third-party application in a Windows Server 2008 R2-based cluster

    support.microsoft.com/default.aspx

  • Is this also an issue on Windows Server 2012?