Oops sorry, my bad... I had to check my own un-brick log and you're absolutely right: LED:000000CC FAddr:0024A051 LED:000000CC FAddr:0024A051 F3 T>/2 F3 2>Z Spin Down Complete Elapsed Time 0.146 msecs F3 2>U Spin Up Complete Elapsed Time 6.824 secs F3 2>/1 F3 1>N1 F3 1> F3 T>m0,2,2,,,,,22 Max Wr Retries = 00, Max Rd Retries = 00, Max ECC T-Level = 14, Max Certify Rewr ite Retries = 00C8 User Partition Format Successful - Elapsed Time 0 mins 00 secs F3 T> Nevertheless, that "DiagError 0000500D" should not be there when the drive's electronics and mechanics are in order, so my guess is you've got bigger problems on your hands. Greetz, Peter. yesterday it was not working, but today it worked.. it now shows 500gb on bios and on windows it shows two partitions, but ask to format them, when you try to open them. anyway i tried running data recovery software and its recovering files as raw files with file000.gif, file001 and so on.. after few attempts the hard drive didnt show anymore.. so i restarted and then it showed again, only in one partition it shows complete free avalible to use drive, which head my very important files and when i click to open it, it opens fine and shows empty.. any idea on how to fix it or get it around? btw it runs fine on bios.