wrote 4194304/4194304 bytes at offset 0
4 MiB, 1024 ops; 0.0022 sec (1.728 GiB/sec and 452896.9483 ops/sec)
wrote 4194304/4194304 bytes at offset 0
4 MiB, 1024 ops; 0.0022 sec (1.701 GiB/sec and 445798.8681 ops/sec)
wrote 4194304/4194304 bytes at offset 0
4 MiB, 1024 ops; 0.0023 sec (1.675 GiB/sec and 439108.0617 ops/sec)
wrote 4194304/4194304 bytes at offset 0
4 MiB, 1024 ops; 0.0022 sec (1.704 GiB/sec and 446576.5373 ops/sec)
wrote 4194304/4194304 bytes at offset 0
4 MiB, 1024 ops; 0.0023 sec (1.698 GiB/sec and 445217.3913 ops/sec)
umount: /dev/sdb: not mounted.