samba - Jan 2026 - Using rsync command to sync changed/new files from old Synology NAS to new Synology NAS

Sorry if I?ve missed but, what exactly is the question ?
On 26 Jan 2026 at 16:22 +0100, Turritopsis Dohrnii Teo En Ming via samba
<samba at lists.samba.org>, wrote:
> Subject: Using rsync command to sync changed/new files from old Synology
NAS to new Synology NAS
>
> Good day from Singapore,
>
> Phase 2: Cut-over day (final sync)
>
> ? Correct approach
>
> On cut-off day:
>
> Stop or restrict user access on old NAS (important!)
>
> Run rsync from old NAS ? new NAS
>
> Only changed/new files are copied
>
> Very fast compared to full copy
>
> --------------------------------------
>
> ?? Important Rules Before rsync
>
> Before you run rsync:
>
> Disable user access on old NAS
>
> Or at least make shared folders read-only
>
> Disable scheduled tasks
>
> Hyper Backup
>
> Synology Drive
>
> Docker containers
>
> Ensure:
>
> Same shared folder names exist on new NAS
>
> Permissions already restored via Hyper Backup
>
> This avoids file changes mid-sync.
>
> -----------------------------------
>
> ? Enable rsync Access on New NAS
>
> On DS1522+:
>
> Control Panel ? File Services ? rsync
> ? Enable rsync service
> ? Enable rsync account
>
> You can either:
>
> Use an admin account, or
>
> Create a dedicated rsync user
>
> -----------------------------------------
>
> ? Recommended rsync Command (SAFE & PROVEN)
>
> Run this on the OLD NAS:
>
> rsync -avh --progress --delete \
> --numeric-ids \
> /volume1/SharedFolderName/ \
> rsyncuser at NEW_NAS_IP::SharedFolderName/
>
> Example
>
> rsync -avh --progress --delete \
> --numeric-ids \
> /volume1/Finance/ \
> rsyncuser at 192.168.1.20::Finance/
>
> ------------------------------------------
>
> ? What Each Option Does (Important)
>
> Option Why it matters
> -a Archive mode (permissions, timestamps, symlinks)
> -v Verbose output
> -h Human-readable sizes
> --progress Shows live transfer status
> --delete Deletes files on NEW NAS that were deleted on OLD NAS
> --numeric-ids Preserves UID/GID exactly (critical for NAS permissions)
>
> ? --delete is correct here because:
>
> New NAS already has a full restore
>
> You want both sides to be identical
>
> -----------------------------------------------
>
> ? Optional: Dry-Run First (Strongly Recommended)
>
> Before the real run:
>
> rsync -avh --progress --delete --numeric-ids --dry-run \
> /volume1/Finance/ \
> rsyncuser at 192.168.1.20::Finance/
>
> ? Shows what would change
> ? Zero risk
>
> -----------------------------------------
>
> ? Multiple Shared Folders
>
> Run one rsync command per shared folder:
>
> for f in "Sales" "Finance" "IT"
"Admin"; do
> rsync -avh --progress --delete --numeric-ids \
> "/volume1/$f/" \
> rsyncuser at 192.168.1.20::"$f/"
> done
>
> ----------------------------------------
>
> ? What NOT to rsync
>
> Do NOT rsync:
>
> /volume1/@*
>
> System folders
>
> Application data (Drive, Photos, Docker)
>
> Those should already be restored via Hyper Backup.
>
> --------------------------------
>
> ? Final Outcome
>
> After rsync:
>
> Data is 100% identical
>
> Permissions preserved
>
> New NAS ready
>
> Old NAS can be powered off or repurposed
>
> Regards,
>
> Mr. Turritopsis Dohrnii Teo En Ming
> Extremely Democratic People's Republic of Singapore
> 26 Jan 2026 Monday 11.21 pm Singapore Time
>
>
>
>
>
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On Mon, 26 Jan 2026 16:24:30 +0100
Luis Peromarta via samba <samba at lists.samba.org> wrote:
> Sorry if I?ve missed but, what exactly is the question ?
I do not think the OP was asking a question, they appeared to be trying
to show how to use rsync between two NAS devices. 

The use of '--numeric-ids' was interesting, as anyone that runs two or
more Samba AD DCs will know, you cannot rely on a user or group ID
being the same on multiple computers, unless they are domain members.

Rowland