AOS supports live vDisk migration between storage containers while the vDisk remains attached to a powered-on guest VM. The VM does not need to be shut down or deleted. This capability allows administrators to move individual vDisks or all eligible vDisks associated with a VM to a container providing different storage settings.
Storage-container properties can include replication factor, encryption, compression, deduplication, and erasure coding. Migrating a vDisk to another container is therefore a controlled method of changing the storage characteristics applied to that disk without interrupting the running workload.
The operation does not require cluster maintenance mode, and existing snapshots do not universally need to be deleted. However, important restrictions apply. Migration cannot proceed when an applicable Prism Central storage policy is configured for the associated VM. Protected VMs may also need to be removed from their protection domain or protection policy before migration. The target container must have sufficient free capacity, and operations such as cloning, resizing, or taking new snapshots may be blocked while migration is active.
The essential requirement tested is that the VM may remain powered on during the storage-container migration.
NHCF/NCA reference: Storage operations, vDisk placement, storage containers, and live migration. Official references: Live vDisk Migration , Migrating a vDisk , and Storage Policy Limitation .
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