== sanity-zero test 3a: truncate to a ZEROSTART boundary with an empty prev component ========================================================== 14:39:17 (1789411157)
1+0 records in
1+0 records out
1048576 bytes (1.0 MB, 1.0 MiB) copied, 0.127474 s, 8.2 MB/s
1+0 records in
1+0 records out
1048576 bytes (1.0 MB, 1.0 MiB) copied, 0.235461 s, 4.5 MB/s