If the cluster is too close to maximum capacity there might be insufficient space to restripe data in the event of a hardware failure, which could put your data at risk.
In addition, should the cluster be allowed to approach 100% used capacity, important system processes will cease to function properly until disk usage is reduced.
- Modify the affected disk pool
- Remove extraneous data
- Add capacity to your cluster
If the event persists, gather logs, and then contact EMC Isilon Technical Support for additional troubleshooting. For instructions, see Gathering cluster logs.