Hi all, I have a hard drive(7200.11, 500G, ST3500320AS, firmware sd15, purchased around August 2008) which just failed. The data is completely inaccessible. Before any further action, I would like to confirm if it is caused by the firmware issue discussed here. The hard drive behaves as follows. When power on, BOIS can detect the drive with correct LBA. But if any "read" action happens, such as try to scan it using MHDD in dos, the drive fails immediately, the status is DRDY. And it cannot be detected anymore, even after reboot. But if power down and then power on, the drive got detectable again. The failure is not exactly like what have been discussed. Is it just a coincidence? Thanks very much in advance for your advice and help!