---
title: "VAST Cluster 5.4.5-SP1 Release Notes"
slug: "vast-cluster-5-4-5-sp1-release-notes"
tags: ["5.4"]
updated: 2026-10-28T01:52:43Z
published: 2026-10-28T01:52:43Z
canonical: "docs.vastdata.com/vast-cluster-5-4-5-sp1-release-notes"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://docs.vastdata.com/llms.txt
> Use this file to discover all available pages before exploring further.

# VAST Cluster 5.4.5-SP1 Release Notes

This release is only available for VAST on Cloud clusters.

- [Resolved Issues](/docs-5-4/docs/vast-cluster-5-4-5-sp1-release-notes#resolved-issues)
- [Limitations](/docs-5-4/docs/vast-cluster-5-4-5-sp1-release-notes#limitations)

## Resolved Issues

### VAST on Cloud (VoC)

- ORION-405554: Introduced an internal change to ensure that VAST on AWS clusters get AWS permissions required to take advantage of one of the upcoming features.

### VAST REST API

- ORION-409117: Made updates to ensure that users with the read-only administrative role cannot perform folder management actions via the respective VAST REST API endpoints.

## Limitations

### VAST on Cloud (VoC)

- VAST Cloud (Polaris) UI does not provide an option to run a cluster upgrade. Cluster upgrades are to be performed using the VAST Web UI.
- VAST on Cloud clusters do not support OS upgrade.
- In the event of downtime, data is rebuilt while the cluster comes back online. In case of a subsequent failure during the rebuild, data integrity is not guaranteed.
- ORION-327048: For VoC on GCP, it is recommended to have a multiple of 8 non-VMS VMs per cluster, since GCP has 8 failure domains and imbalance may result in failed stripe allocations.
- ORION-145141: Creating a tenant with EKM encryption is not supported on VoC clusters.
- ORION-113036: After you reregister the same VoC cluster in Uplink, information about the previously registered instance of this cluster is no longer available in Uplink.