Volume Storage

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Volumes are persistent block storage devices that you can attach to your instances. Unlike ephemeral storage, volume data persists independently of the instance lifecycle — you can detach, resize, snapshot, and reattach volumes as needed.

Overview:

• Attaching a Volume — connect block storage to a running instance
• Volume Snapshots — back up and recover volume data
• Extending a Volume — increase the size of an existing volume
• Multi-Attach Volumes — share a volume across multiple instances with a cluster-aware filesystem
• Migrating a Volume — move volumes between OpenStack providers