What does Time Machine back up?

Barney63

macrumors 6502a
Original poster
Jan 9, 2014
799
1
Bolton, UK.
What does TM actually back up?
On the first one I expect it is the entire disk, but what about the incrementals?
Does it only back up new files and files that have been changed or does it do everything?

Barney
 

ApfelKuchen

macrumors 68040
Aug 28, 2012
3,181
1,854
Between the coasts
The incremental backups only include the files that have changed.

It doesn't look that way when you browse Time Machine - each date looks as if it's a complete backup. However, it's actually pointing to the one copy that's kept of each file/version.
 

Barney63

macrumors 6502a
Original poster
Jan 9, 2014
799
1
Bolton, UK.
I have hardly used it today and it is doing an hourly backup now of 7gb!
Why so much I've only been browsing the forums and been on Facebook for 10 minutes.

Barney
 

hfg

macrumors 68040
Dec 1, 2006
3,566
277
Cedar Rapids, IA. USA
I have hardly used it today and it is doing an hourly backup now of 7gb!
Why so much I've only been browsing the forums and been on Facebook for 10 minutes.

Barney
Do you use a Virtual Machine for Windows (VMware Fusion or Parallels)?

If so, you need to exclude the vm from the TimeMachine backup.
 

sjinsjca

macrumors 68020
Oct 30, 2008
2,061
398
I use parallels.
I will exclude it in the morning.
Thanks.

Barney
Do you care if your virtual machines are not backed up?

Mine are mission-critical. And yes, they get rather large. By all means, when you set up a virtual machine, set it up so that the virtual disks are split into small (typically 2GB) chunks. That minimizes the amount of backing-up that's needed.

But think twice about excluding them from your backup.

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Do you use a Virtual Machine for Windows (VMware Fusion or Parallels)?

If so, you need to exclude the vm from the TimeMachine backup.
That's dangerous advice.
 

Barney63

macrumors 6502a
Original poster
Jan 9, 2014
799
1
Bolton, UK.
I only run one program in widows and the data from that is shared with an osx version of the program. So it will still get backed up by time machine.

Barney
 

glenthompson

macrumors 68000
Apr 27, 2011
1,929
128
Florida
My Windows virtual machines are backed up outside of time machine. I keep the files used by Windows in my Mac file space so they are backed up continually. Just because I don't use time machine to back it up doesn't mean it doesn't get backed up.
 

hfg

macrumors 68040
Dec 1, 2006
3,566
277
Cedar Rapids, IA. USA
I periodically "clone" my vm when I think it necessary. My Windows vm is over 40GB and I usually have it running all the time. If I let TimeMachine include it in the hourly backup, the backup would never stop.
 

Barney63

macrumors 6502a
Original poster
Jan 9, 2014
799
1
Bolton, UK.
I've found the Windows7.pvm and excluded that, but it is only 6.91GB.
The backup is still doing 62.67GB, where is all that coming from?
I haven't even been on the laptop for any files to have changed!
I also noticed when I logged on Time Machine asked me if I wanted to use the TC as the name had changed or something.

Barney
 

gnasher729

macrumors P6
Nov 25, 2005
16,530
3,129
I've found the Windows7.pvm and excluded that, but it is only 6.91GB.
The backup is still doing 62.67GB, where is all that coming from?
I haven't even been on the laptop for any files to have changed!
I also noticed when I logged on Time Machine asked me if I wanted to use the TC as the name had changed or something.

Barney
"name had changed or something" is probably the reason why it does a full backup again.
 

Barney63

macrumors 6502a
Original poster
Jan 9, 2014
799
1
Bolton, UK.
Why would the name change?
It appears the same to me.
I have got a malware infection that I can't seem to get rid of, it is Geonei Adware, but I don't think that can change anything or it would be a virus wouldn't it?

Barney