+> - When encrypting Linux OS volumes, the VM should be considered unavailable. We strongly recommend to avoid SSH logins while the encryption is in progress to avoid issues blocking any open files that will need to be accessed during the encryption process. To check progress, use the [Get-AzVMDiskEncryptionStatus](/powershell/module/az.compute/get-azvmdiskencryptionstatus) PowerShell cmdlet or the [vm encryption show](/cli/azure/vm/encryption#az-vm-encryption-show) CLI command. This process can be expected to take a few hours for a 30GB OS volume, plus additional time for encrypting data volumes. Data volume encryption time will be proportional to the size and quantity of the data volumes; the `encrypt format all` option is faster than in-place encryption, but will result in the loss of all data on the disks.
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