== sanity-zero test 3a: truncate to a ZEROSTART boundary with an empty prev component ========================================================== 14:28:03 (1790706483) 1+0 records in 1+0 records out 1048576 bytes (1.0 MB, 1.0 MiB) copied, 0.118866 s, 8.8 MB/s 1+0 records in 1+0 records out 1048576 bytes (1.0 MB, 1.0 MiB) copied, 0.203849 s, 5.1 MB/s