VAST Block CSI Driver 2.6.6 is released to General Availability as of August 2026.
To upgrade to VAST Block CSI Driver 2.6.6, follow the upgrade procedure in the VAST Block CSI Driver 2.6 Administrator's Guide.
New Features
Asynchronous Replication of Block Volumes
VAST Block CSI Driver 2.6.6 supports asynchronous replication of block volumes between VAST clusters, with an ability to perform a failover to the secondary replication peer. Multiple replication destinations are supported.
NOTE: Asynchronous replication of block volumes requires VAST Cluster 5.5.0 or later.
To configure replication with the driver, use VAST CSI Replication Operator that offers automated replication management based on the replication CRDs you supply. For more information and guidance, see VAST Block CSI Driver Administrator's Guide.
The following limitation applies:
VCSI-488: Creating a PVC from a snapshot (or from another PVC) on a source or destination replication peer is not allowed.
Enhancements
VCSI-372: Added support for the ReadOnlyMany (ROX) access mode for block volumes with
volumeMode: Filesystem. To allow or disallow attaching filesystem volumes with the ROX mode, use the allowROManyBlockFsMode parameter in the driver's Helm chart configuration file. By default, ROX is not allowed.VCSI-358: Changed the default priority class for the VAST CSI node pod from
system-cluster-criticalto system-node-critical.VCSI-388: Added NVMe controller metrics that can be exported to Prometheus. The new metrics provide real-time information about NVMe controllers connected to the node.