You can boot instances from a volume instead of an image. Use
the nova boot
--block-device parameter to define how
volumes are attached to an instance when you create it. You can
use the --block-device parameter with
existing or new volumes that you create from a source image,
volume, or snapshot.
![[Note]](../common/images/admon/note.png) | Note |
|---|---|
To attach a volume to a running instance, see Manage volumes. |
