== sanity test 101b: check stride-io mode read-ahead =========================================================================== 06:36:29 (1787826989)

1.572684s, 5.33394MB/s
Read-ahead success for size 8192

2.032280s, 4.12768MB/s
Read-ahead success for size 16384

2.241006s, 3.74323MB/s
Read-ahead success for size 32768

1.553032s, 5.40144MB/s
Read-ahead success for size 65536

1.786657s, 4.69514MB/s
Read-ahead success for size 131072

1.491466s, 5.6244MB/s
Read-ahead success for size 262144

1.002956s, 8.36388MB/s
Read-ahead success for size 524288

1.451225s, 5.78036MB/s
Read-ahead success for size 1048576