About this task
For hardware maintenance procedures, such as instructions for replacing a controller, see the installation and maintenance instructions for your appliance.

Each StorageGRID Webscale appliance is represented as one Storage Node in the StorageGRID Webscale system.
Notes for Storage Node recovery
CAUTION:
Do not perform this procedure if more than one Storage Node is offline, or if more than one Storage Node has a failure of any kind. Doing so might result in data loss.
Contact technical support.
CAUTION:
Do not rebuild Cassandra on more than one Storage Node within a 15-day period.
Rebuilding Cassandra on two or more Storage Nodes within 15 days of each other might result in data loss. Contact technical support.
Attention: If ILM rules are configured to store only one replicated copy and the copy exists on a Storage Node that has failed, you will not be able to recover the object. However, you must still perform the procedure to restore object data to a storage volume to purge lost object information from the database.
Note: If you encounter a DDS alarm during recovery, see troubleshooting instructions to recover from the alarm by rebuilding Cassandra. After Cassandra is rebuilt, alarms should clear. If alarms do not clear, contact technical support.