wrote 4194304/4194304 bytes at offset 0
4 MiB, 1024 ops; 0.0030 sec (1.297 GiB/sec and 339973.4396 ops/sec)
wrote 4194304/4194304 bytes at offset 0
4 MiB, 1024 ops; 0.0030 sec (1.289 GiB/sec and 337953.7954 ops/sec)
wrote 4194304/4194304 bytes at offset 0
4 MiB, 1024 ops; 0.0032 sec (1.218 GiB/sec and 319301.5279 ops/sec)
wrote 4194304/4194304 bytes at offset 0
4 MiB, 1024 ops; 0.0030 sec (1.286 GiB/sec and 337174.8436 ops/sec)
wrote 4194304/4194304 bytes at offset 0
4 MiB, 1024 ops; 0.0031 sec (1.250 GiB/sec and 327784.8912 ops/sec)
umount: /dev/sdb: not mounted.