Current means of redundancy include replication and parity checks.
This mechanism is responsible for making file data available to requests.
Assuming there exists some method of managing data replication (assigning quotas, etc.)
autonomously within the grid, data could be configured for high availability, regardless of loss or outage.
Additionally, a grid (network based) file system breaks traditional TCP/IP paradigms in that a file system (generally low level, ring 0 type of operations) require complicated TCP/IP implementations, introducing layers of abstraction and complication to the process of creating such a grid file system.