Thank you for reply... On HP24 firmware was also bad sectors,first problem was that bios dont see the drive,but i was able to install system on it,and then i run HD Sentinel,and see about 2000 bad sector,later i found this solution,but first i updated the firmware to SD1A,i was hoping that bad sectors are gone,but not.Then i try the fix of BSY and LBA0,it was successfully,turn on hard drive,run sentinel,healt was 100%,performance also,then again updated firmware,and later,bad sectors return...When i run surface test it's all ok,no sign of bad sectors,but sentinel show's it... I was hoping that I would solve the problem and I was persistent, but I no longer have the nerves! I have no data on it,now i'm selling the drive!