rm -f "$seqres.full"
# Format and mount
-_scratch_mkfs | _filter_mkfs > $seqres.full 2> $tmp.mkfs || _fail "mkfs failed"
+_scratch_mkfs | _filter_mkfs > $seqres.full 2> $tmp.mkfs
+test "${PIPESTATUS[0]}" -eq 0 || _fail "mkfs failed"
_scratch_mount
# Get directory block size