If a MongoDB cluster’s storage disk ever becomes completely full, it may suffer severe issues. For example, the cluster may become stuck in a crash-loop, where it indefinitely crashes, restarts, and crashes again during its reboot, until we manually troubleshoot it.

To prevent this, when a cluster’s disk reaches 97% capacity, we automatically block further writes to it. If your cluster is blocked, you receive an email notification.

To remove this block, you can use one of the following methods:

• You can upgrade your cluster’s maximum disk space.
• You can open a support ticket and request that we manually override the block.