Detaching a disk from a VM

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Updated at October 17, 2024

You can detach a disk from either a running and stopped VM.

Note

You cannot detach a boot disk from a VM. You cannot detach a local disk from a VM running on a dedicated host.

For a disk to be successfully detached from a running VM, the operating system must be ready to accept commands to detach disks. Before detaching a disk, make sure that the OS is loaded or stop the VM, otherwise the detach disk operation fails. If an error occurs, stop the VM and try again.

To detach a disk from a VM:

Management console

CLI

API

In the management console, select the folder the VM belongs to.
Select Compute Cloud.
In the left-hand panel, select Disks.
Next to the disk you need to detach, click , and then click Detach.
Click Detach.

If you do not have the Yandex Cloud command line interface yet, install and initialize it.

The folder specified in the CLI profile is used by default. You can specify a different folder using the --folder-name or --folder-id parameter.

See the description of the CLI's detach disk command:
```
yc compute instance detach-disk --help
```

Get a list of VMs in the default folder:

yc compute instance list

Result:

+----------------------+-----------------+---------------+---------+----------------------+
|          ID          |       NAME      |    ZONE ID    | STATUS  |     DESCRIPTION      |
+----------------------+-----------------+---------------+---------+----------------------+
| fhm0b28lgfp4******** | first-instance  | ru-central1-a | RUNNING | my first vm via CLI  |
| fhm9gk85nj7g******** | second-instance | ru-central1-a | RUNNING | my second vm via CLI |
+----------------------+-----------------+---------------+---------+----------------------+

Select the ID or NAME of the VM, e.g., first-instance.

Get a list of disks attached to the VM:

yc compute instance get --full first-instance

Select the right disk_id, e.g., fhm4aq4hvq5g********.

Detach the disk:

yc compute instance detach-disk first-instance \
  --disk-id fhm4aq4hvq5g********

If an error occurs, stop the virtual machine:

yc compute instance stop first-instance

Then try to detach the disk again.

If the virtual machine was stopped, restart it:
```
yc compute instance start first-instance
```

Use the detachDisk REST API method for the Instance resource or the InstanceService/DetachDisk gRPC API call.

Detaching a disk from a VM

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