Shutting Down and Restarting an Array
PS Series 50E to 400E storage arrays include redundant, hot-swappable disks, fan trays, power supplies, and control modules (if a dual control module array). You can remove a redundant component without affecting operation if a functioning component is available. Otherwise, it is recommended that you cleanly shut down the array and turn off power before removing a component.

Note: When an array is shut down, any volumes with data on the array will be set offline until the array is successfully restarted. This may affect initiators connected to the volumes.

To shut down an array, follow these steps:
1. Do one of the following:
– Use telnet or SSH to connect to a functioning IP address assigned to a network interface on the array. Do not connect to the group IP address.
– Use the null modem cable shipped with the array to connect Serial Port 0 on the active control module (LED labeled ACT is green) to a console or a computer running a terminal emulator. See Appendix B, Setting Up a Serial Connection for more information.
2. Log in to an account with read-write access, such as the grpadmin account.
3. Enter the shutdown command.

If you are using a serial connection to shut down an array, it is safe to turn off power when the “press any key” message appears. (Pressing any key will restart both control modules.) If you are using a network connection, the session will be disconnected before the array is fully shut down. Confirm that the ACT LED on each control module is off (not lit) before turning off power to the array. After performing array maintenance, you can turn on power to the array. When the array restart completes, the member and volumes will be set online.

Thanks for the help, man.. also, what are the steps to power the array back on? thanks

My previous answer was cut'n'paste of the topic "Shutting Down and Restarting an Array" from section 1-6 in the "PS Series Storage Arrays Hardware Maintenance Models 50E to 400E". The last sentence in my previous post tells you how power the array back on.

You can find the same guide by registering as a customer at equallogic.com and go to Resources --> Documentation --> PS50 to PS400E --> Hardware Maintenance - PS50E to PS400E (English).