RDM Peer Persistence disk disconnect issues

[mtrohde]

We have a pair of Server 2016 servers VMs configured as a failover cluster with RDMs presented from our 3PAR-9450.  When we failover the RDM to our other 3PAR the disks on the VMs disconnect and we can't get the disks to come back on line.

This is an error we see in the cluster logs.

Cluster resource 'Cluster Disk 1' of type 'Physical Disk' in clustered role '<REDACTED>' failed. The error code was '0x80070490' ('Element not found.').
 
Based on the failure policies for the resource and role, the cluster service may try to bring the resource online on this node or move the group to another node of the cluster and then restart it.  Check the resource and group state using Failover Cluster Manager or the Get-ClusterResource Windows PowerShell cmdlet.

We have to shutdown both VMs and cold boot one VM.  Once it brings the disk online we can start the second VM.  Any thoughts on what is causing our problem? 

Michael

[scott28tt]

What mode are the RDMs in?

What bus sharing configuration do you have set?

This KB article may help.

[mtrohde]

Physical RDM and Physical on the bus using paravirtual controller on both nodes.  Multi-writer is not set because disks are controlled by failover cluster.

Hosts are all 6.7U3

Michael

[wverbraecken]

Hello,

Did you find a solution for this issue?

We are experiencing an issue that resembles this, a cluster with RDM's, the volumes are inaccessible during a short period of time when we do a switchover in the peer persistence config (3PAR 8000 systems).

Thanks,

Wesley