(vCenter Alarm) DR Store Degraded in Multi-Pathing Mode

Owned by Harish, created
Last updated: Jul 12, 2024 by Anthony Lai
1 min read

This article applies to all JSDR software versions.

Alarm

This alarm signals failure or degredation of a storage IO path in a multi-path network configuration.

alarm-datastore degraded.png
Example: Alarm definition in vCenter.

This alarm only applies to environments that use iSCSI multi-path IO configurations for replication log disks.

Symptoms

When iSCSI storage that uses multi-pathing mode exhibits degraded performance, users may observe:

  • iSCSI sessions timing out or dropping.

  • Slower data transfer rates or higher than usual read/write times.

  • Frequent path failures or loss of connectivity.

Resolution

  1. Validate the storage network and ensure there are no underlying issues with it.

  2. Validate the logs related to the provisioned iSCSI storage.

    • Search for any path failures.

    • Search for any change or reduction in replication transfer speeds.

      • Try to identify the time and cause of any problems.

  3. If a path is down or not operating properly, resolve the problem then validate that normal behavior has been restored.

This issue can be encountered when the replication log disk is configured for iSCSI multipathing, typically only used for on-premises configurations.
AVS does not directly support or generally use iSCSI disks in multipathing mode.