PowerStore: Accessing Metro Volume from Non-Optimized Node may lead to Unexpected Module Restart

Summary: Accessing a Metro volume from the Asymmetric Logical Unit Access (ALUA) non-Optimized node may lead to an unexpected module restart.

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Symptoms

Unexpected module restart and in some rare cases both nodes may experience an unexpected module restart leading to service disruption.

Cause

The following conditions must be met for the issue to exist:

  • Metro is configured.
  • Write I/O to the same stretched volume LBAs from any appliance.
  • Host I/O to the ALUA non-optimized node on either appliance.

Due to a software issue, the above conditions can lead to an unexpected Data Path assert.

Resolution

The issue is addressed in PowerStoreOS 4.1.0 and later.

Workaround

Customer should verify that hosts are configured according to PowerStore best practices. Hosts should communicate with the ALUA optimized node on either the preferred or non-preferred side. Contact Dell Technical Support to confirm this issue has occurred. Reference this article in the Service Request for expedited handling. 

Affected Products

PowerStore 1200T, PowerStore 3200T, PowerStore 500T, PowerStore 5200T, PowerStore 9200T
Article Properties
Article Number: 000261447
Article Type: Solution
Last Modified: 19 Mar 2025
Version:  2
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