Assume the following numbers for hardware performance: - 1kB=1000 Bytes, 1MB=1000kB, etc. - 64MB IO blocks have size 64MB (contiguous) - Nx64MB blocks have size N64MB (contiguous) - RAM access takes 100ns (negligible as it is so quick so you can ignore RAM access times in your calculations) - SSD access takes 10s - HDD access takes 10ms - Network transfer takes 1us - RAM transfer speed (scan) is 100GB/sec SSD transfer speed (scan) is 5GB/sec - HDD transfer speed (scan) is 100MB/sec