To achieve the maximum IOPS (260 K), it's recommended to use a 4-KiB block size. For maximum performance throughput (8 GB/s), you can choose to use one of the following: 64 KiB, 128 KiB, 256 KiB or 1-MiB block size. However, it's important to optimize the I/O size based on the specific requirements of your application and to use the recommended block sizes only as a guideline.