Release Notes

Fixes

I/O errors or unresponsive virtual machines

Description This issue occurs on Dell EMC hardware that is configured for failover cluster and has attached shared storage

hosting multiple virtual machines with Multipath I/O (MPIO) enabled. If you perform multiple removals and

installations of the PowerEdge MX5016s storage expander module, or if you remove and install the PowerEdge

MX5000s SAS I/O module, I/O errors occur and the virtual machines goes to unresponsive or failed state. This

issue may cause the Cluster Shared Volume to go to failed state.

Fix

1. Install the latest Service stack updates (SSU) and update the cumulative update from https://

support.microsoft.com/en-us/help/4457127 or later.

2. Create a registry key, Reg_DWORD, with a value 0x1 in the following registry path on all the cluster nodes:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\StorPort\QoSFlags.

3. Restart the nodes to enable the registry key.

Affected systems

• PowerEdge MX7000 chassis with PowerEdge MX740c or PowerEdge MX840c compute nodes and

PowerEdge MX5016s storage sleds.

• Any Rx4x or Tx4x PowerEdge server with external storage array attached.

Tracking number 103498

Unable to delete a NVDIMM storage pool

Description

A storage pool is created by converting NVDIMMs into storage drives. When you delete the storage pool, the pool

state indicates the status as deleted, but the storage pool reappears after rescanning the drives.

Fix Use the Windows Cumulative Updates KB4490481 available at https://support.microsoft.com/en-us/help/

4490481 or the latest update.

Affected Systems PowerEdge R640, T640, R740, R740XD, R940, R840, R940xa, Mx740c, Mx840c

Tracking number 113286

8 Fixes