Thanks SofLit pointing me to X-CUBE-H7-PERF, problem solved!However I have a few comments wish someday ST/ARM can consider.  I only need store some user data into SDRAM, a simple flag such as "NOLOAD" - maybe GCC have this - shall be easily meet this...

I met exactly the same problem. By step-in to __main assembly, found the reason is that, __scatterload is trying to copy variables from load address to exec address, which include copy to external SDRAM (0xd0000000), but at this time, external SDRAM ...