== sanity-zero test 3a: truncate to a ZEROSTART boundary with an empty prev component ========================================================== 14:28:49 (1790706529)
1+0 records in
1+0 records out
1048576 bytes (1.0 MB, 1.0 MiB) copied, 0.073823 s, 14.2 MB/s
1+0 records in
1+0 records out
1048576 bytes (1.0 MB, 1.0 MiB) copied, 0.111919 s, 9.4 MB/s