PowerFlex: NVDIMM as a DAX device failed to reconfigure namespace: Invalid argument

During the execution of the procedure described in  "Deploy VxFlex OS v3.x"  for "Prepare the DAX devices" section 9 - "Convert the namespace device to the acceleration device name of type /dev/daxX.X:"

The following error might occur → 

ndctl create-namespace -e namespace0.0 --mode=devdax --align=4K -f
failed to reconfigure namespace: Invalid argument

1. Install/upgrade the following packages to the listed versions below 

   kmod-redhat-nfit-3.10.0_957-1.el7_6.x86_64.rpm 
   ndctl-64.1-2.el7.x86_64.rpm
   libpmemblk-1.5.1-2.1.el7.x86_64.rpm
   libpmem-1.5.1-2.1.el7.x86_64.rpm

2.  Check the size by executing the next command 

   ndctl list --regions -v

   
   Example:

   (The size is "17179869184" in the example)
   
   ndctl list --regions -v
   
   
   [
     {
       “dev”:”region1”,
       “size”:17179869184,
       “available_size”:0,
       “max_available_extent”:0,
       “type”:”pmem”,
       “numa_node”:1,
       “iset_id”:7828749584277088034,
       “persistence_domain”:”unknown”
     },
     {
       “dev”:”region0”,
       “size”:17179869184,
       “available_size”:17179869184,
       “max_available_extent”:17179869184,
       “type”:”pmem”,
       “numa_node”:0,
       “iset_id”:-7016240687023610078,
       “persistence_domain”:”unknown”
     }
   ]

    

3. Instead of the command in section 9 (as described above), please create the namespace using the following command → 
   

   ndctl create-namespace -f -e namespaceX.X --mode=devdax --align=4K -s <size>

    

   Example:

   ndctl create-namespace -f -e namespace0.0 --mode=devdax --align=4K -s 17179869184
   
   {
     "dev":"namespace0.0",
     "mode":"devdax",
     "map":"dev",
     "size":"15.75 GiB (16.91 GB)",
     "uuid":"1040658d-xxxx-xxxx-xxxx-a224f6cd6fa4",
     "daxregion":{
       "id":0,
       "size":"15.75 GiB (16.91 GB)",
       "align":4096,
       "devices":[
         {
           "chardev":"dax0.0",
           "size":"15.75 GiB (16.91 GB)"
         }
       ]
     },
     "align":4096,
     "name":"o-autolabel"
   }

4. Validate that the device was created by running "ls /dev/dax*"
   Example:

   ls /dev/dax*
   /dev/dax0.0  /dev/dax1.0