Migrate TM backus from Synology to TrueNAS Scale ElectricEel

TrueNAS General
1

Update:
I added --no-perms at the end of the rsync command and it is transferring…
so will see if this works…

I have a Synology NAS that has timemachine backups on it…
Goal - restore all previous TM Backups from Synolgy to the TrueNAS Basic TM share.
TrueNAS - ElectricEel-24.10.2
TimeMachine = TM
Basic TimeMachine Share - TM-Share
Generic Share - Gen-Share

Gen-Share created and rsync’d all the TM backups to Gen-Share.

Testing

  • created a Basic TM (TM-Share)
  • successful TM Backup from Mac
  • rsync different machine TM backup via rsync from Gen-Share to TM-Share
  • running rsync as root, the rsync fails restoring to Gen-Share
    Error
    sync: [generator] failed to set permissions on
    “/mnt/dozer/backups/time/mac.sparsebundle/bands”: Operation not permitted (1)

Looking for best practises.
I also tried applying Basic TM permissions to the Gen-Share but that also failed.
Decent at CLI

Thanks…

2

You should set proper ACL on TrueNAS and then rsync excluding permissions. Synology also may store metadata and alternate datastreams in an on-disk format incompatible with TrueNAS and so you may have to do this through the SMB protocol rather than rsync.

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4

Both jobs from 2 different machines to 2 different Basic TM share erased the old backups but did complete successfully.
I use rsync with a --partial since it can resume if the connection breaks.
Will continue to test… .

5

What do you mean that they erased the backups? It sounds like maybe your rsync task was unsuccessful then.

6

TM said it could not use the existing backup so it erased and did a new one…successfully.
I have used rsync for years but… I will try your suggestion…

7

TM sparsebundles are notoriously fussy from what I can recall especially when communicating over a network share.

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8

Update - One TM Backup restore worked successfully.
Steps

  • rsync -avz --partial user@synology:/volume1/timeshare/mac.sparsebundle --no-perms .
  • Stopped and started SMB on TrueNAS
  • Connected to the TM share (TrueNAS) via TM
  • Verified the (restored) TM Backup
  • TM reported over 6k changes
  • Kicked off a new TM back
  • TM Backup completed successfully in a very short time.

This was a TM Backup of less than 1 TB.
Next step is to restore a TM Backup of about 2 TB

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9

Update 2:
The large 2TB finally mounted… for some reason it was labeled
“.backbundle” and not “.sparsebundle”
the TM Share would not mount

  • renamed the .backupbundle to.back
  • share mounted
  • ran a test TM backup - once it started and started writing files I canceled it
    and removed the directory.
  • renamed 2TB to .sparsebundle
  • verified - took a while but was successful
  • kicked off a TM backup (using the 2TB TM backup file)
  • after a few hours, backup completed successfully