== sanity test 77a: normal checksum read/write operation ========================================================== 07:51:44 (1790941904) 8+0 records in 8+0 records out 8388608 bytes (8.4 MB, 8.0 MiB) copied, 0.392637 s, 21.4 MB/s 8+0 records in 8+0 records out 8388608 bytes (8.4 MB, 8.0 MiB) copied, 1.15928 s, 7.2 MB/s