wrote 4194304/4194304 bytes at offset 0
4 MiB, 1024 ops; 0.0023 sec (1.643 GiB/sec and 430795.1199 ops/sec)
wrote 4194304/4194304 bytes at offset 0
4 MiB, 1024 ops; 0.0023 sec (1.671 GiB/sec and 437981.1805 ops/sec)
wrote 4194304/4194304 bytes at offset 0
4 MiB, 1024 ops; 0.0023 sec (1.648 GiB/sec and 432067.5105 ops/sec)
wrote 4194304/4194304 bytes at offset 0
4 MiB, 1024 ops; 0.0022 sec (1.719 GiB/sec and 450505.9393 ops/sec)
wrote 4194304/4194304 bytes at offset 0
4 MiB, 1024 ops; 0.0022 sec (1.713 GiB/sec and 449122.8070 ops/sec)
umount: /dev/sdb: not mounted.