SuperDrive Firmware Update 3.0
This update will eliminate the noise made by the optical disk drive during wake from sleep on your Mac. This update works with the following EFI updates:
iMac EFI Firmware Update 1.4
Mac mini EFI Firmware Update 1.2
MacBook EFI Firmware Update 1.4
MacBook Pro EFI Firmware Update 1.8
To complete the firmware update process, please follow the instructions in the updater application (/Applications/Utilities/SuperDrive Update.app). The updater will launch automatically when the installation is complete.
For detailed information about this update, please visit this website: About SuperDrive Firmware Update 3.0.