Procedure: Removing system data from a node canister
You can safely remove system information from a node canister, if you follow the
proper guidelines and procedure. The information that is removed includes
configuration data, cache data, and location data.
About this task
Attention: Do not remove the system data from a node canister unless instructed
to do so by a service procedure. Do not use this procedure to remove the system
data from the only online node canister in a system. If the system data is removed
or lost from all node canisters in the system, the system is effectively deleted.
Attempting a system recovery procedure to restore a deleted system is not
guaranteed to recover all of your volumes.
Procedure
1. Log into the service assistant of the node canister.
2. Use the service assistant node action to hold the node canister in service state.
3. Click Manage System; then click Remove system data to remove the system
data from the node canister.
Results
The node canister restarts in service state.
What to do next
When you want the node canister to be active again, use the service assistant to
leave service state. The node canister moves to candidate state, and can be added
to the system. If the partner node canister is already active, the candidate node
canister is added automatically.
Procedure: Deleting a system completely
You might need to completely remove all system information. When the procedure
is finished, the system operates like a new installation. No data is retained.
About this task
Attention: This procedure makes all the volume data that you have on your
system inaccessible. You cannot recover the data. This procedure affects all
volumes that are managed by your system.
Do not continue unless you are certain that you want to remove all the volume
data and configuration data from your system. This procedure is not used as part
of any recovery action.
There are two stages to this procedure. First, the node canisters are reset. Second,
the enclosure data is reset.
Procedure
1. Start the service assistant on one of the node canisters.
2. Use the service assistant node action to hold the node in service state.
3. Use the Manage System option to remove the system data from the node.
4. Repeat steps 1 through 3 on the second node canister in the enclosure.
270 Storwize V7000 Unified: Problem Determination Guide 2073-720
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