AWS Storage Gateway User Guide
Understanding Volume Status and Transitions
Understanding Cached Volume Status Transitions
Use the following state diagram to understand the most common transitions between statuses for
volumes in cached gateways. You don't need to understand the diagram in detail to use your gateway
effectively. Rather, the diagram provides detailed information if you are interested in knowing more
about how volume gateways work.
The diagram doesn't show the Upload Buffer Not Configured status or the Deleting status. Volume
states in the diagram appear as green, yellow, and red boxes. You can interpret the colors as described
following.
Color Volume Status
Green The gateway is operating normally. The volume
status is Available or eventually becomes Available.
Yellow The volume has the Pass Through status, which
indicates there is a potential issue with the storage
volume. If this status appears because the upload
buffer space is filled, then in some cases buffer
space becomes available again. At that point, the
storage volume self-corrects to the Available status.
In other cases, you might have to add more upload
buffer space to your gateway to allow the storage
volume status to become Available. For information
on how to troubleshoot a case when upload buffer
capacity has been exceeded, see Troubleshooting
Volume Issues (p. 331). For information on how
to add upload buffer capacity, see Determining the
Size of Upload Buffer to Allocate (p. 221).
Red The storage volume has the Irrecoverable status.
In this case, you should delete the volume. For
information on how to do this, see To remove a
volume (p. 160).
In the diagram, a transition between two states is depicted with a labeled line. For example, the
transition from the Creating status to the Available status is labeled as Create Basic Volume or Create
Volume from Snapshot. This transition represents creating a cached volume. For more information about
creating storage volumes, see Adding a Volume (p. 156).
API Version 2013-06-30
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