IBM System Storage DS3300, Installation, User'S, And Maintenance Manual

Page: 82 / 140

4. Remove the controller from the chassis.
a. On the left side of the controller, press the orange release tab to the right
just enough to release the handle; then, rotate the handle upward.
b. Slowly pull the handle away from the chassis to remove the controller from
the bay, as shown in Figure 35.
c. Place the controller on a level surface.
Attention: After you remove a controller, wait 70 seconds before you reseat or
replace the controller. Failure to do so might cause unpredictable results.
Installing a controller
Use this procedure to install a new controller as the second controller, controller B
(controller A is installed in the left controller bay; controller B is installed in the right
controller bay).
Attention: Make sure that the two controllers have the same cache memory
capacity. An incompatible controller will be placed in a lockout state by the other
controller in the DS3300.
To install a controller in the storage subsystem, complete the following steps:
1. Read the safety information that begins on page xi and “Best practices
guidelines” on page 6.
2. Make sure that the second controller has the same DIMM size as controller A.
3. Install new dual-controller NVSRAM on controller A. See “Downloading
controller or NVSRAM” in the System Storage DS3000 Storage Manager
Installation and Support Guide for information about how to download the
NVSRAM software.
Note: Obtain the latest dual-controller NVSRAM software from
http://www.ibm.com/servers/storage/support/disk/.
4. Start the command-line interface; then, enter the following command to change
controller A from simplex (single-controller) mode to duplex (dual-controller)
mode:
Smcli ctlr_A_IP_address -c "set storageSubsystem redundancyMode=duplex;"
5. Shut down the storage subsystem, and then start it again (see “Turning on the
storage subsystem” on page 44). If controller A was successfully converted to
Handle Guide pin Notch
Figure 35. Removing a controller
64
System Storage DS3300 Storage Subsystem: Installation, User’s, and Maintenance Guide