Now ,I am testing the speed of the IDE(ATA) on a PC.
The hard disk had have a File System on it (made under DOS) ,
so , I use :
then write(fd,0x5000000,number) and read(fd,0xa000000,number);
and so on.
The hard is 7200 speed. The data volumeI impletement a time is
The result is : write:4MB/s
I think it is impossible, so slowly !