Rclone sync between Synology SMB and local drive running into timeouts

Help and Support
1

What is the problem you are having with rclone?

rclone sync between Synology SMB and local drive running into timeouts

I've been syncing between my Synology NAS and the roon server with SMB without any problems.

I now wanted to create another sync on a local drive for faster access, which is when the issues started.

The files with errors seem to be piling up and blocking progress.

Run the command 'rclone version' and share the full output of the command.

rclone v1.70.3

  • os/version: darwin 15.5 (64 bit)
  • os/kernel: 24.5.0 (arm64)
  • os/type: darwin
  • os/arch: arm64 (ARMv8 compatible)
  • go/version: go1.24.5
  • go/linking: dynamic
  • go/tags: none

Which cloud storage system are you using? (eg Google Drive)

None (Synology NAS)

The command you were trying to run (eg rclone copy /tmp remote:tmp)

rclone -P -v sync FLAC:/FLAC/ FLAClocal:/Volumes/Data/FLAC

Please run 'rclone config redacted' and share the full output. If you get command not found, please make sure to update rclone.

[Dropbox]
type = smb
host = XXX
pass = XXX

[FLAC]
type = smb
host = XXX
pass = XXX

[FLAClocal]
type = local

[ROCK]
type = smb
host = XXX
user = XXX
pass = XXX

A log from the command that you were trying to run with the -vv flag

2025/07/27 15:43:59 NOTICE: Cowboy_Junkies/The_Caution_Horses_[1990_CD_44kHz_DR12]/01_10_You_Will_Be_Loved_Again.flac.8c54ec98.partial: Removing partially written file on error: read Cowboy_Junkies\The_Caution_Horses_[1990_CD_44kHz_DR12]\01_10_You_Will_Be_Loved_Again.flac: connection error: read tcp 192.168.1.97:54628->192.168.1.98:445: i/o timeout
Transferred:   	    3.758 GiB / 417.363 GiB, 1%, 279 B/s, ETA 50y20w8h
Checks:              1989 / 1989, 100%, Listed 14349
Transferred:           85 / 9232, 1%
Elapsed time:      28m0.0s
Transferring:
 * Bruce_Springsteen/Born…/01_08_Jungleland.flac:  9% /52.415Mi, 8/s, 1562h42m23s
 * Carole_King/The_Legend…1_10_Its_Too_Late.flac: 78% /117.594Mi, 353/s, 21h6m59s
 * Climax_Blues_Band/Flyi…ce_The_Night_Away.flac: 18% /21.571Mi, 10/s, 491h36m40s
 * Cowboy_Junkies/The_Cau…ll_Be_Loved_Again.flac: 21% /18.633Mi, 318/s, 13h23m10s
2

welcome to the forum,

sorry, not sure what that means?
you are trying to run two rclone commands at the same time or what?

as requested post a debug output using -vv, not -v
or
better yet post the output of --log-level=DEBUG --log-file=/path/to/rclone.log
note: delete the log before running rclone each time.

check out my howto guide about rclone + smb

side issue: not sure FLAClocal is required.
/Volumes/Data/FLAC should be the same as FLAClocal:/Volumes/Data/FLAC

3

Thanks for the reply. I'm not running two parallel syncs, they're different jobs for different purposes.

Anyway, the -vv brought up this:

2025/07/27 16:14:43 DEBUG : Yes/90125_[2024_SACD_88kHz_DR12]/01_08_City_Of_Love.flac: Need to transfer - File not found at Destination

2025/07/27 16:14:43 DEBUG : Local file system at /home/koehntopp/flac: Waiting for checks to finish

2025/07/27 16:14:43 DEBUG : Local file system at /home/koehntopp/flac: Waiting for transfers to finish

4

that is just one second of a log snippet, nothing of use in it.

fwiw, test a sync using the same exact source and dest but without using rclone.