Question I have a weird issue that we have reproduced several times on the X9SRW-F. I have tried the 1.0b and 2.0 BIOS on the motherboard so far. After we use DD tool to install Debian OS onto a 1TB Constellation ES drive that is hooked up to the motherboard, the system will no longer boot past the A2 POST code. What is the code A2? How can this be resolved? Answer BIOS POST code A2 means that it can not detect a HDD with a valid partition structure and boot record. You have to install the OS using standard installation procedure instead of using DD command. Was this FAQ helpful? YES      NO Enter Comments Below: Note: Your comments/feedback should be limited to this FAQ only. For technical support, please send an email to support@supermicro.com.  Enter your email address below if you'd like technical support staff to reply:  Please type the Captcha (no space) A H 9 T FAQ Stats FAQ ID Related Category / Keyword Date Posted Code 16759 Operating Systems: - Linux OS - Other Operating Systems Storage: - Hard drives 08/09/13     Print Answer