== sanity-zero test 3a: truncate to a ZEROSTART boundary with an empty prev component ========================================================== 14:39:56 (1789411196)
1+0 records in
1+0 records out
1048576 bytes (1.0 MB, 1.0 MiB) copied, 0.183654 s, 5.7 MB/s
1+0 records in
1+0 records out
1048576 bytes (1.0 MB, 1.0 MiB) copied, 0.22924 s, 4.6 MB/s