== sanity-zero test 3a: truncate to a ZEROSTART boundary with an empty prev component ========================================================== 14:35:25 (1789410925)
1+0 records in
1+0 records out
1048576 bytes (1.0 MB, 1.0 MiB) copied, 0.295397 s, 3.5 MB/s
1+0 records in
1+0 records out
1048576 bytes (1.0 MB, 1.0 MiB) copied, 0.220992 s, 4.7 MB/s