PowerFlex 5.X: Disk Group Capacity is Failed

Summary: An alert is raised when a Disk Group (DG) enters a failed capacity fault tolerance state, indicating that the system has lost redundancy and is at risk of data unavailability.

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Symptoms

Alert Message:

Device Group: dg_title (ID <DG ID>) capacity fault tolerance state is failed.

 

 Impact

  • Storage Pools within the affected DG are in a critical state.
  • Block storage reports potential data unavailability.
  • I/O operations may be disrupted or blocked until the issue is resolved.

Cause

A DG enters a failed state when:

  • Multiple devices or nodes within the group are unavailable or failed.
  • The system can no longer maintain data redundancy or recoverability.

Resolution

Step 1: Validate Failed State

From the Primary MDM, run the following command:

This confirms whether the DG is in a failed state.

scli --query_all | grep -i failed

 

Step 2: Recovery Actions

  • Validate all Storage Nodes are powered on. If any are down:
    • Resolve hardware issues (e.g., PSU, motherboard, cabling).
    • Power on the node manually or via remote management.
  • Clear the device(s) error from PowerFlex.
  • Exit Maintenance Mode if any nodes are in MM:
      
    scli --exit_storage_node_maintenance_mode

Additional Information

Impacted Versions

PowerFlex 5.x

Affected Products

PowerFlex Software
Article Properties
Article Number: 000365831
Article Type: Solution
Last Modified: 06 Oct 2025
Version:  2
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