PowerStore: SAS topology change may lead to node reboot

Summary: A change in the SAS topology (such as LCC disconnect, cable disconnect, several drives removed and more) may under rare instances lead to a node reboot. This issue only affects appliances attached to a SAS enclosure (aka Tabasco). ...

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Symptoms

Node reboots and automatically recovers. In some scenarios, both nodes may reboot and lead to service disruption.

Cause

The SAS driver has different processes for handling a single drive removal vs multiple drives removal (bulk removal). When handling bulk removal (such as LCC/cable issue), the driver must abort all I/O for each drive. A software issue exists where, during the cleanup process, there is a race condition with another process that attempts to also abort I/O that no longer exists. This leads to a node reboot. This is a rare race condition.

Resolution

The issue is fixed in PowerStoreOS 3.5.
 

Workaround

Contact Technical Support support for assistance.

Affected Products

PowerStore Expansion Enclosure
Article Properties
Article Number: 000210883
Article Type: Solution
Last Modified: 31 Jul 2023
Version:  5
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