IBM Storwize V7000 Unified Problem Determination Manual page 324

10. If no node canisters are online, the system is not online. To recover the system
11. If only the replacement node is in service state with node error 503, apply
12. When the node canister is powered up, it is automatically added to the system
13. When the canister is back online, check the event log for any new events that
Replacing a Storwize V7000 Gen1 node canister
This topic describes how to replace a node canister.
About this task
Attention: Even though many of these components are hot-swappable, they are
intended to be used only when your system is not active (no I/O operations). If
your system is powered on and processing I/O operations, go to the management
GUI and follow the fix procedures. Initiating the replacement actions without the
assistance of the fix procedures can result in loss of data or loss of access to data.
Be careful when you are replacing the hardware components that are located in the
back of the system that you do not inadvertently disturb or remove any cables that
you are not instructed to remove.
Attention: Do not replace one type of node canister with another type. For
example, do not replace a model 2076-112 node canister with a model 2076-312
node canister.
Be aware of the following canister LED states:
v If both the power LED and system status LED are on, do not remove a node
v If the system status is off, it is acceptable to remove a node canister. However,
v If the power LED is flashing or off, it is safe to remove a node canister.
Attention: Even if a node canister is powered off, it is still possible to lose data.
Do not remove a node canister unless directed to do so by a service procedure.
To replace the node canister, perform the following steps:
Procedure
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Storwize V7000 Unified: Problem Determination Guide 2073-720
8. If the enclosure is powered and the canister is correctly installed, the canister
starts automatically. Repeat from step 5 on page 295, if the canister is not
correctly installed.
9. Reinsert the data cables into the ports that they were originally connected.
in the case when no node canisters are online, see "Recover system
procedure" on page 380.
"Procedure: Rescuing Storwize V7000 Gen2 node canister software from
another node (node rescue)" on page 284 to rescue the replacement node
canister.
and the system automatically ensures that the machine code version on the
new canister matches that of the other node canister in the control enclosure.
This is reflected in the system event log.
might indicate a problem with the reassembly.
canister unless directed to do so by a service procedure.
do not remove a node canister unless directed to do so by a service procedure.
However, do not remove a node canister unless directed to do so by a service
procedure.
1. Read the safety information to which "Preparing to remove and replace parts"
on page 295 refers.