Time Capsule Backup

Syntheso

macrumors newbie
Original poster
Dec 4, 2011
8
0
Hey,

I just completed my first Time Capsule backup and it says 'Latest Backup: Yesterday", which implies it was successful. However, I have used 300GB of HD space on the computer I backed up, whereas the Time Capsule is only at 150GB used.. how can this be?

Thanks.
 

iMarvin

macrumors 6502
Sep 29, 2011
268
2
On the internet!
Hey,

I just completed my first Time Capsule backup and it says 'Latest Backup: Yesterday", which implies it was successful. However, I have used 300GB of HD space on the computer I backed up, whereas the Time Capsule is only at 150GB used.. how can this be?

Thanks.
Just back it up again if you are uncertain? :)
 

skorpien

macrumors 68020
Jan 14, 2008
2,337
0
Do you have any folders added to your "Do not back up" list in Time Machine preferences? Do you have a Windows partition on your HDD?

Time Machine will not back up any folders in the exceptions list, nor will it back up any partitions used for Windows or other OS installations (any non Mac partitions).
 

hafr

macrumors 68030
Sep 21, 2011
2,742
5
Hey,

I just completed my first Time Capsule backup and it says 'Latest Backup: Yesterday", which implies it was successful. However, I have used 300GB of HD space on the computer I backed up, whereas the Time Capsule is only at 150GB used.. how can this be?

Thanks.
The file size of the TM backup isn't always correct for some reason. If you mount the backup volume (just click on the Time Machine icon, choose Enter Time Machine, press cancel to exit it) and then verify that disk in Disk Utility (Utilities > Disk Utility > Verify Disk) you will get the correct size of your backup under the title Used in the bottom right corner of the window.

Another possibility is that you're actually using a lot less space than you think. Click the Apple logo in the upper left corner, About this mac, More info, Storage. How big is the "Backup" section here?
 

flynz4

macrumors 68040
Aug 9, 2009
3,125
35
Portland, OR
I do not know if TM/TC uses any de-dup technology. If you have duplicate files, then it is possible only one copy is being stored.

Examples of this being significant include importing photos into iPhoto or Aperture libraries and keeping originals. Likewise, importing music into iTunes and keeping originals might have the same affect.

Not all backup programs have de-dup... and I have no idea if TM/TC does.

/Jim