Skip to main content

Unable to Provision to Windows Server 2008 or 2008R2 Failover Cluster Target Due to Timeout (KBA1648)





Applicable Delphix Versions

Major Release

Sub Releases




When provisioning SQL Server VDBs to Windows Server 2008 or 2008R2 Failover Cluster Targets, using the versions listed above, you may experience the following failure after approximately 20 minutes:


Attempt to discover and mount LUNs from the Delphix Engine through the iSCSI initiator on target host "TARGETHOST" timed out. | Make sure the target host has not exhausted all of its memory. If SQL Server instances are running on the target host, limit the maximum memory for all SQL Server instances to leave sufficient memory (at least 2 GB) for other operations on the host. Check the Windows event log for iSCSI initiator timeout errors.

Troubleshooting Error "exception.windowshost.mount.timedout"

During provisioning, Failover Cluster Manager will show the new disk in an "Online Pending" state, with the following additional information:

Disk resource dlpx-{id} is running chkdsk on volume \\?\Volume{GUID}

Messages related to chkdsk may also appear in the Windows System Event Log.

This behavior is a result of a compatibility issue between the disk images used by the Delphix Engine in affected versions (created using Windows 2012R2), and Failover Clusters using Windows Server 2008 or Windows Server 2008R2.

This issue is not known to be present in Delphix Engine versions prior to, and should only affect dSources that were linked while the engine was running an affected version.


For further troubleshooting and to evaluate options for resolving this issue, please contact Delphix Support.

This issue is fixed in Delphix versions and later.

After upgrading to Delphix, any VDBs or dSources that were created in affected versions will need to be recreated from scratch in order for the disk volumes to be recreated.