To safely create an EBS snapshot and store it on S3
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As stated in more detail below, although not a true prerequisite, it is recommended you detach or freeze all writes to the volume prior to taking the snapshot.
Google snapshots are a series of data blocks that are saved to Remote Object Store. A Google snapshot represents a volume at a particular point in time. You can take a snapshot of a volume regardless of whether or not the volume is attached to a running instance, although it is strongly recommended that you either detach or freeze all writes to a volume before taking a snapshot in order to prevent any data loss or corruption. If you do not take these necessary precautions, your data will not be in synch and you could possibly lose or corrupt data on the disk.
You can take Snapshots of a volume at a particular point in time and then create multiple volumes from a snapshot. You can see the lineage of a volume/snapshot to see when it was created, as well as any parent/child relationships.
Depending on the size of the volume, it might take several minutes to create the snapshot. You must wait for its status to become "completed" before you can launch it and create a volume from the new snapshot.
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