== sanity test 101b: check stride-io mode read-ahead =========================================================================== 07:46:06 (1781610366)

0.864501s, 9.70341MB/s
Read-ahead success for size 8192

0.837700s, 10.0139MB/s
Read-ahead success for size 16384

0.850345s, 9.86495MB/s
Read-ahead success for size 32768

0.861008s, 9.74278MB/s
Read-ahead success for size 65536

0.739071s, 11.3502MB/s
Read-ahead success for size 131072

0.743283s, 11.2859MB/s
Read-ahead success for size 262144

0.641115s, 13.0844MB/s
Read-ahead success for size 524288

0.666275s, 12.5903MB/s
Read-ahead success for size 1048576