HP Surestore Disk Array 12h Controller Module Installation Guide - Page 9

Figure 3. Replacing an Array Controller Flowchart Replacing an Array Controller NOTE: In some cases, you may need to download firmware when replacing a controller. Downloading firmware is an offline process. In most cases, the LUNs on the array need to be either un-mounted or deactivated from the volume group. Does this disk array have a single controller? Yes (Single Controller) Perform procedure "Replace D" Replacing a Single Controller (replace single) No (Dual Controller) Does the replacement controller have the same firmware that is in the disk array? No Is the disk array a boot device? Perform procedure "Replace A" Replacing controller and firmware Yes matches (replace matching) Perform procedure "Replace C" Yes Replacing controller on boot device and firmware does NOT match (replace boot) No Perform procedure "Replace B" Replacing controller and firmware does NOT match (replace non boot) 9