== sanity test 184c: Concurrent write and layout swap ==== 19:14:51 (1788218091) 55+0 records in 55+0 records out 57671680 bytes (58 MB, 55 MiB) copied, 9.29522 s, 6.2 MB/s 36+0 records in 36+0 records out 37748736 bytes (38 MB, 36 MiB) copied, 5.66843 s, 6.7 MB/s ref file size: ref1(57671680), ref2(37748736) 3520+0 records in 3520+0 records out 57671680 bytes (58 MB, 55 MiB) copied, 16.0241 s, 3.6 MB/s Copied 393216 bytes before swapping layout...