PowerFlex : Failed to Add Acceleration Device DAX after NVDIMM Replacement

Summary: After sanitizing or replacing an NVDIMM, adding the acceleration/dax devices back into PowerFlex Manager will generate an IO error if the namespace or region is in an error state. This will hinder the ability to add the devices back into PowerFlex as expected. ...

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Symptoms

When attempting to add the dax device back after sanitizing or replacing an NVDIMM, an error is given for IO errors on the dax device, despite being healthy.

 

Failed to Add Acceleration Device

Cause

These errors occur due to conflicting namespace and regions within the SDS after removing the dax devices.

Resolution

1- SSH into the impacted SDS and destroy both namespaces of the dax devices

ndctl destroy-namespace namespace0.0

ndctl destroy-namespace namespace1.0

 

2- Disable the corresponding region of the dax devices

ndctl disable-region region0

ndctl disable-region region1

 

3- Re-enable the regions for the dax devices

ndctl enable-region region0

ndctl enable-region region1

 

4- Create the namespace for each dax device based on the namespace you destroyed from above

ndctl create-namespace --mode=devdax --region +region0 --align +4k

ndctl create-namespace --mode=devdax --region +region1 --align +4k

 

5- Afterwards, go to PowerFlex Manager and add the dax devices as needed.

Related article: PowerFlex: How to Replace NVDIMM in 15G and later PowerEdge Node

Affected Products

ScaleIO
Article Properties
Article Number: 000496145
Article Type: Solution
Last Modified: 07 Aug 2026
Version:  1
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