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From: Rich <rich@example.invalid>
Newsgroups: comp.os.linux.misc
Subject: Re: Time machine backups
Date: Wed, 8 Jan 2025 18:25:29 -0000 (UTC)
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Lars Poulsen <lars@cleo.beagle-ears.com> wrote:
> On 2025-01-08, The Natural Philosopher <tnp@invalid.invalid> wrote:
>> Anyioe expecting to preserve an ext4 file system accurately on a samba 
>> mounted share needs their head examined.
>> Use NFS.
> 
> I am not expecting to accurately have an exact ext4 system on a share.
> Just keeps the data, but deduplicated. AFAIK,

Don't try to directly 'rsync' any Linux filesystem to a samba share as 
a backup.  Samba will not store everything needed to recover (you'll 
have your data, except for those files with names that are 'invalid' in 
the windows samba world) but none of the ownerships/permissions will be 
correct.

If you must use samba as the backing store, then use something like 
Restic which stores the data in its own internal format and only 
requires "basic file storage and basic filenames" support from the 
underlying backing store.

Restic: https://restic.net/