The Quantastor product requires a minimum version of v4.2.4 for HA environments to function properly.
Any Quantastor HA environments running software lower that v4.2.4 are not supported.
Quantastor HA environments must use version v4.2.4 or higher due to changes in the ZFS driver.
AN HA environment that does not have the updated driver loaded will not function correctly during a failover.
Please review the link below for additional detail:
v4.2.4.004 (May 3rd 2017) DRIVER UPGRADE AVAILABLE REBOOT REQUIRED
- Adds new ZFS filesystem Driver 0.6.5.8-osn-4. This driver addresses an issue in the ZFS Kernel Driver that could rarely occur during a Kernel Memory allocation that could result in a Kernel Panic instead of a Warning message.