== 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, 0.0972851 s, 10.8 MB/s
1+0 records in
1+0 records out
1048576 bytes (1.0 MB, 1.0 MiB) copied, 0.147328 s, 7.1 MB/s