TimS  wrote:
> On 13 Jan 2021 at 22:45:19 GMT, Richard Falken  wrote:
>
> >   Re: Re: My darn NAS...
> >   By: TimS to All on Thu Jan 14 2021 11:43 am
> >
> >  > Incremental backup as done by Time Machine allows many more backups.
It's do
> >  > with hard links, so a file is backed up the first time, but hard links
are
> >  > created for subsequent backups. This means that what is presented to me
when
> >  > want to do a restore from a selected date just looks an ordinary folder
as i
> >  > would appear on the Desktop. I highlight one or more files/folders with
the
> >  > mouse and click Restore. No farting about with command line options that
I
> >  > have no interest in remembering.
> >
> > Hard link based incremental backups are great. I do a lot of it with rsync.
> > There is something worth mentioning, though:
> >
> > You may use hard link based backups in order to make a snapshot per week,
but
> > if a file remains unchanged for long, all your hard links will be pointing
to
> > the same file in your backup drive. This means if the file gets corrupted
you
> > have no copies of it despite having 500+ "images". I have seen it happen
and it
> > is not pretty.
>
> I don't know whether Time Machine does this or not, or perhaps limits the
> number of hard links to any file and creates a new complete backup of teh
file
> and starts again.
>
> On my main file machine I've set TM to use a second disk; it alternates
> between them, so this is some protection.
>
That's a rather neat idea, I might get my backup system to do it.

--
Chris Green
·

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