PowerStore: creating a new datastore on an iSCSI connected ESXi host fails with error "Cannot change the host configuration. Failed to update disk partition for"

Summary: Creating a new datastore with a PowerStore volume may fail on an iSCSI connected ESXi host with error "Cannot change the host configuration. Failed to update disk partition for ..."

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Symptoms

Creating a new datastore on an iSCSI connected ESXi host fails with error "Cannot change the host configuration. Failed to update disk partition for ..."

This happens on all PowerStore volumes.

vSphere shows:
image.png

Cause

Network misconfiguration, such as MTU mismatches between the ESXi hosts, switches, and the PowerStore, are known to cause this issue.

Resolution

A few options to resolve the issue:
  1. Ensure the ESXi hosts, Switches, and PowerStore all have valid and consistent MTU settings for the recommended MTU size of 9000.
  2. If this is not possible, change the ESXi host and the PowerStore storage network MTU to default 1500 (not recommended). Settings > Network IPs > Storage, select the relevant storage network then Reconfigure.

Test the connectivity using VMware KB: https://kb.vmware.com/s/article/1003728

Affected Products

PowerStore
Article Properties
Article Number: 000193550
Article Type: Solution
Last Modified: 23 Dec 2021
Version:  2
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