== sanity test 101b: check stride-io mode read-ahead =========================================================================== 07:00:23 (1781607623)

1.200681s, 6.98654MB/s
Read-ahead success for size 8192

1.189226s, 7.05384MB/s
Read-ahead success for size 16384

1.512197s, 5.5473MB/s
Read-ahead success for size 32768

1.182800s, 7.09216MB/s
Read-ahead success for size 65536

1.091039s, 7.68864MB/s
Read-ahead success for size 131072

0.983946s, 8.52548MB/s
Read-ahead success for size 262144

0.805382s, 10.4157MB/s
Read-ahead success for size 524288

0.823813s, 10.1827MB/s
Read-ahead success for size 1048576