Owners Manual

PS3000 Series Hardware Maintenance Maintaining Control Modules
3–7
Figure 3-6: Recommended Dual Control Module Configuration
Removing a Control Module
If a control module fails, you should remove it and replace it with a functioning
control module. You also may need to temporarily remove a control module to
replace a compact flash card.
In a dual control module PS3000 Series array, you can remove a control module
without shutting down the array, if the remaining control module has at least one
connected and functioning network interface. However, if you remove the active
control module (the LED labeled ACT will be green), there will be a short
interruption as failover to the secondary control module occurs.
Caution: Do not remove a control module from an array while the control
modules are still synchronizing. A message will appear on the console
when synchronization completes. The ACT LED on the secondary
control module will be orange when synchronization completes.
Before removing a control module:
• If you have a single control module array, if possible, cleanly shut down the
array before removing the control module to protect against cache data loss.
See Shutting Down and Restarting an Array on page 1-4.
• Disconnect any serial or network cables attached to the control module. If you
have a dual control module array, you may want to re-attach the network
cables to the functioning control module to ensure uninterrupted data access.
• Attach an electrostatic wrist strap, as described in Using an Electrostatic Wrist
Strap on page 1-4.