== sanity test 77a: normal checksum read/write operation ========================================================== 10:35:47 (1790001347) 8+0 records in 8+0 records out 8388608 bytes (8.4 MB, 8.0 MiB) copied, 0.432842 s, 19.4 MB/s 8+0 records in 8+0 records out 8388608 bytes (8.4 MB, 8.0 MiB) copied, 1.11324 s, 7.5 MB/s