== sanity test 101b: check stride-io mode read-ahead =========================================================================== 09:19:53 (1783948793)

1.926886s, 4.35345MB/s
Read-ahead success for size 8192

1.840528s, 4.55772MB/s
Read-ahead success for size 16384

2.707716s, 3.09804MB/s
Read-ahead success for size 32768

1.772940s, 4.73147MB/s
Read-ahead success for size 65536

1.507396s, 5.56497MB/s
Read-ahead success for size 131072

1.179719s, 7.11068MB/s
Read-ahead success for size 262144

1.280423s, 6.55143MB/s
Read-ahead success for size 524288

1.133774s, 7.39884MB/s
Read-ahead success for size 1048576