what happens when you disconnect the SATA cable of the ATA?
Sorry what you mean ? The SATA cable connected to the SATA/ATA converter.
When I disconnect the cable, nothing happens.I don't know how to update my BIOS, may be it is the problem the BIOS ? A day ago it works properly, both HDDs I could see connected, but after leaving the computer turned off, it doesn't detect anymore.
Many thanks for you replay.