Persistent
Ephemeral Storage
Amazon EC2 Instance’s default storage is ephemeral (scratch / temporary)
Storage lifetime = Instance lifetime (disappear when the instance terminates)
Locally-attached storage (Direct-attached storage)
Your server & disk may just disappear (rare, but possible)
Don’t expect the provider to restore your data
Use EBS (Elastic Block Store) volumes for persistent data
Or maintain high-availability mechanism
Other providers will give you persistent storage (by default)
Check the service description before use