== sanity-zero test 3a: truncate to a ZEROSTART boundary with an empty prev component ========================================================== 14:39:11 (1789411151)
1+0 records in
1+0 records out
1048576 bytes (1.0 MB, 1.0 MiB) copied, 0.0658843 s, 15.9 MB/s
1+0 records in
1+0 records out
1048576 bytes (1.0 MB, 1.0 MiB) copied, 0.105018 s, 10.0 MB/s