Technical data

Chapter 2: Upgrading Trays in the Storage Array 29
ATTENTION Possible degraded performance – To prevent degraded performance,
do not twist, fold, pinch, or step on the fiber-optic cables. Do not bend the fiber-optic
cables tighter than a 5-cm (2-in.) radius.
5. Stop all host I/O operations.
6. Use one of the following options to place controller A offline.
ATTENTION Possible data loss or corruption – Wait for the blue Controller
Service Action Allowed LED on controller A to come on before you turn off the power
to either controller; otherwise, possible data loss or corruption might occur.
Figure 15 Controller LEDs
1. Controller Service Action Allowed LED (Blue)
2. Controller Service Action Required LED (Amber)
7. Turn off the Power switch on each of the power-fan canisters, and wait until all
LED and seven-segment display activity on the rear of the controller-drive tray
has stopped.
SANtricity ES From the Hardware pane in the Array Management
Window, right-click the picture of the controller, and
select Advanced >> Place >> Offline.
Command line interface Enter the following command on the command line:
smCLI
<DNS-network-name-or-IP-address> -c
“set controller [a]
availability=offline”;
In this command,
<DNS-network-name-or-IP-address> is
the applicable address.