== sanity test 101b: check stride-io mode read-ahead =========================================================================== 02:27:41 (1769758061)

1.774747s, 4.72665MB/s
Read-ahead success for size 8192

1.927918s, 4.35112MB/s
Read-ahead success for size 16384

2.153323s, 3.89566MB/s
Read-ahead success for size 32768

1.790577s, 4.68486MB/s
Read-ahead success for size 65536

1.444395s, 5.8077MB/s
Read-ahead success for size 131072

1.007184s, 8.32877MB/s
Read-ahead success for size 262144

1.342502s, 6.24849MB/s
Read-ahead success for size 524288

1.029255s, 8.15017MB/s
Read-ahead success for size 1048576