As I see, the data sheet of Exadata x4-2 says Oracle used 10.000 RPM disks for high performance. You probably know that Exadata provides 2 alternative configurations for hard disks. You may pick high performance (but low capacity) disks, or you may pick high capacity (but low performance) disks. Previous Exadatas (x3, x2) had 15.000 RPM disks for high performance, and 7.200 RPM disks for high capacity.
According to the data sheet, Although Exadata x4 uses 10.000 RPM disks, it still provides same disk IOPs (50.000). How does it achieve the same IOPs with slower disks? I’ve also noticed that Exadata x4 with high capacity disks (7.200 RPM) provides higher IOPs than Exadata x3 and x2 (32.000 instead of 28.000). So I’m really wondering how Oracle increased disk IOPs using slower/same RPM disks.
UPDATE: After Teymur Hajiyev pointed that Exadata x4 uses 2.5″ disks, I found a blog post explaining why you may prefer 2.5″ disk drives: 2.5 inch 10K RPM Drives – The New Model of Efficiency