Dell EqualLogic PS4210XV35 EqualLogic PS4210 Storage Arrays - Hardware Owners - Page 25

PS4210 Hardware Owner's Manual 3 Maintaining Control Modules If a cable is connected to a network port on the newly active control module, network I/O can switch to its network interface. Depending on circumstances, network I/O might instead continue through the previously active control module. (For example, the control module that becomes active can use either its own local network interface, or the network interface on the previously active control module.) Control module failover occurs automatically, and if iSCSI initiators reconnect to the group IP address, application I/O can continue without user intervention. Maintaining Control Module Firmware A Type 19 control module has a microSD card running the array firmware. You should run the latest firmware version to take advantage of new product features and enhancements. In a dual control module array, both control modules must be running the same firmware version; otherwise, only one control module will be functional. You must update the controller with the older version firmware to the same version as the active before you update the member to a later version. Group members should run the same firmware version; otherwise, only the functionality common to all versions will be available in the group. See the PS Series Release Notes for information about mixed-firmware groups. If you are replacing a failed control module, remove the microSD card from the failed control module and install it in the replacement control module. Using the card from the failed control module ensures that you keep the correct firmware. See Replacing the MicroSD Card on page 24. To display the firmware version running on an array, examine the GUI Member Controllers window or use the following CLI command: member select membername show controllers If the firmware on a microSD card does not match the firmware running on an array, do not install it. Instead, contact your array support provider. Control Module Handling Requirements Follow these control module handling requirements: • Do not remove an active control module. • Protect control modules from electrostatic discharge. Always wear an electrostatic wrist strap when handling a control module. See Protecting Hardware on page 1. • Do not remove a control module from an array while the control modules are synchronizing. When synchronization completes, a console message will appear. Also, the ACT LED on the secondary control module will be orange. • Do not leave a control module slot empty. In an array with one control module, always attach a blank face plate to the empty control module slot. • Store control modules properly. Store a control module in its original packaging or in an antistatic bag or place the control module on a surface protected from electrostatic discharge. About the Standby On/Off Button The control module has a small, recessed button labeled STANDBY ON/OFF (see Figure 16). The button is recessed to prevent accidental activation. 19