Unity Catalog Volumes

Unity Catalog Volumes is a Databricks data governance capability, introduced 2023.

DBFS mounts → Init scripts on DBFS → Unity Catalog Volumes

Unity Catalog objects that govern non-tabular data (files of any format) alongside tables - a recommended alternative to the deprecated DBFS mounts.

• Volumes bring PDFs, images, and any other non-tabular files under the same Unity Catalog governance as your tables - a folder of files and a table, governed side by side. 🔗
• They come in two flavors: managed volumes on Databricks-managed storage, and external volumes over your own cloud storage. 🔗

⚠ Limitations: Volumes require Databricks Runtime 13.3 LTS or above or a SQL warehouse, don't support dbutils.fs commands distributed to executors, can't be accessed from RDDs or Unity Catalog UDFs, can't back a custom Hadoop file system, and require fully qualified /Volumes paths (no abbreviated paths). 🔗

Category

Data governance

Introduced

2023🔗

Also known as

Volumes, managed volumes, external volumes

Verified

2026-07-23