There have been many issues with the Hard Drive which was manufactured with the Mac Book Pro in 2009. Well Apples seems to have answered the problem with latest firmware update.
MacBook Pro Hard Drive Firmware Update 2.0 reduces certain infrequent noises made by 7200-rpm drives.
These drives shipped with the June 2009 MacBook Pro.
To complete the firmware update process, please follow the instructions in the updater application (/Applications/Utilities/Hard Drive Update.app).
The updater will launch automatically when the installation is complete.
New Hard Drive firmware will be: 0007APM2
How they fixed the issue with this Firmware Update? No one knows it except Apple. Let’s wait for some more hot news 🙂