Avago Technologies MegaRAID Fast Path Software - Manual (Page 406)

Page 406 LSI Corporation Confidential | July 2011
MegaRAID SAS Software User Guide Chapter 10: Maintaining and Managing Storage Configurations | Upgrading the Firmware
10.7 Upgrading the Firmware The MegaRAID Storage Manager software enables you to easily upgrade the controller
firmware.
To avoid data loss because of dirty cache on the controller, the utility forces the virtual
disks into Write Through mode after a firmware upgrade. It is in this mode until the
server reboots. In Write Through mode, the controller sends a data transfer completion
signal to the host when the disk subsystem has received all of the data in a transaction.
This way, in case of a power outage, the controller does not discard the dirty cache.
Follow these steps to upgrade the firmware:
1. In the left panel of the MegaRAID Storage Manager window, click on the icon of the
controller you need to upgrade.
2. In the MegaRAID Storage Manager window, select Go To >> Controller >> Update
Controller Firmware.
3. Click Browse to locate the .rom update file, as shown in the following figure.
Figure 268: Update Controller Firmware Dialog
4. After you locate the file, click Ok.
The MegaRAID Storage Manager software displays the version of the existing
firmware and the version of the new firmware file.
5. When you are prompted to indicate whether you want to upgrade the firmware,
click Yes.
The controller is updated with the new firmware code contained in the .rom file.
6. Reboot the system after the new firmware is flashed.
The new firmware does not take effect until reboot.