on my ubuntu server,
--- created a samba share
--- sync and check a local dir to that samba share
no errors
source dir info
rclone sync d:\data\l\go\user01.go\go\pkg\mod\google.golang.org \\192.168.62.238\test --transfers=256 --checkers=256 --progress
Transferred: 289.027 MiB / 289.027 MiB, 100%, 3.420 MiB/s, ETA 0s
Transferred: 3576 / 3576, 100%
Elapsed time: 1m36.5s
rclone check d:\data\l\go\user01.go\go\pkg\mod\google.golang.org \\192.168.62.238\test --checkers=256 --progress
2022-06-22 19:24:52 NOTICE: Local file system at //?/UNC/192.168.62.238/test: 0 differences found
2022-06-22 19:24:52 NOTICE: Local file system at //?/UNC/192.168.62.238/test: 3576 matching files
Transferred: 0 B / 0 B, -, 0 B/s, ETA -
Checks: 3576 / 3576, 100%
Elapsed time: 26.4s