Storage DRS Does Not Generate Recommendations for All NFS 4.1 Datastores in the cluster
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Storage DRS Does Not Generate Recommendations for All NFS 4.1 Datastores in the cluster

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Article ID: 403952

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Updated On:

Products

VMware vSphere ESXi

Issue/Introduction

  • In environments using NFS 4.1 datastores Storage DRS generates recommendations for only one datastore, while other NFS 4.1 datastores do not receive any recommendations for load balancing or initial placement.
  • Storage DRS consistently selects the same datastore and does not provide alternative placement options.
  • Additionally, Storage DRS reports faults such as: "Could not balance datastore IOPS reservation."

Environment

vSphere 8.0

vSphere 7.0

Cause

vSphere 8.0: 

Storage DRS supports only initial placement and space-based load balancing for NFS 4.1 datastores. 

I/O-based balancing is not supported for NFS 4.1 in this version.

vSphere 7.0:

Storage DRS does not support NFS 4.1 datastores at all.

Resolution

Since I/O-based load balancing is not supported for NFS 4.1 datastores in vSphere 8.0, you can disable I/O reservation using below steps:

  • Disable the option "Enable IO metric for SDRS recommendations".
  • Set the following advanced SDRS options:
    EnforceIOReservations = 0
    EnableIoLoadBalancing = 0

 

Additional Information