Upgrading the Firmware

The MegaRAID Storage Manager software lets you 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 remains 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.

Perform these steps to upgrade the controller firmware:

1.	In the left panel of the MegaRAID Storage Manager main menu screen, click on the icon of the controller you need to upgrade.

2.	On the MegaRAID Storage Manager main menu screen, click Go To > Controller > Update Controller Firmware.

3.	Click Browse to locate the .rom update file, as the following figure shows.

Figure 41. 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. The MegaRAID Storage Manager software does not let you overwrite a newer version of the firmware with an older version.

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.