Time machine: old user on new mac?

[Slogrun]

Hello all

I’ve searched the internet without any success, so now I turn to you gurus for help.

I run a small network only consisting macs. Every mac have time machine set up to backup to a NAS Synology server, which means there is a user registered to each mac on the server.

I’m about to upgrade two users with new MacBook airs, and I don’t want to set these macs up with a four year old time machine backup filled to the edge with old files and what not.
However, I still want to set up time machine on the same username.

So, the big question is: If I create a new time machine backup on the same username that back up the old mac on this new MacBook air, will the old backups be deleted?
Or will the backup-line continue?

I am too afraid to just try it out and see what happens because, you know; I’m guessing there is no turning back once these files get overwritten.

Thanks in advance,
- Sig

 

[Wirbowsky]

I suppose that for each user Time Machine creates a bundle with the name of the Mac. So, I suppose that if the new Macs have different names, you will not overwrite the other time machines backups.

 

[Slogrun]

hmm

Do you know what would happen if I did this on the same mac?
A couple of weeks ago I formatted a mac and re-installed everything due to slowness. I did not dare take the risk so I made a new user just in case.

 

[blacka4]

i know when I did a reformat and didn't set up from a backup, time machine just created a new sparsebundle And i used the same username and everything

for example

MacBook Pro (original file)
MacBook Pro 1 (new file after reformat)

 

[Slogrun]

The results

You guys where right!

I just went ahead and did a Time Machine backup on this new MacBook Air, and a new bundle appeared on my NAS server. Nothing got overwritten.

Thanks!

 

[JamesPDX]

The issue of "proof in the pudding" will be when you attempt a restore. I'm truly hoping the best for you and your backups.