HP Surestore Disk Array FC60 HP SureStore E Disk Array FC60 Service Manual (A5 - Page 205
NVSRAM Behavior, Can I use ACS to create the controller firmware configuration I need?
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case, the controller with the higher firmware version number will be used as the firmware source and its code will be copied to the other controller. Note Can I use ACS to create the controller firmware configuration I need? It is not recommended that you rely on ACS to alter the firmware on a controller. You should use the firmware download procedures described in Chapter 4 for changing the controller firmware. NVSRAM Behavior The NVSRAM settings control various operating parameters of the disk array. Because of its importance, a copy of each controller's NVSRAM is stored in the dacStore region on the disks. During the Start Of Day process, each controller reads the NVSRAM information from the disks and uses it to configures its NVSRAM settings. This automatic updating of the NVSRAM may cause undesired results in some situations. For example, you might attempt to upgrade the firmware on a disk array by installing two new controllers that have the new firmware loaded on them. When the disk array is powered up, the older version of the NVSRAM will be copied from the disks to the controllers. This results in NVSRAM that does match the firmware and bootware on the controller. Managing the Disk Array Moving a Volume Group from One Disk Array to Another 205