Time Machine Saying Not Enough Space on Disk

dmetzcher

dmetzcher

Metzcher.com
I am getting the following error from Time Machine when doing my first backup. The startup disk being backed up, and the TM disk are both the same size.

Macintosh HD: 465.44 (total); 393.99 (free); 71.45 (free)
Time Machine: 465.44 (total); 465.29 (free)

The Time Machine error is:
"This backup is too large for the backup volume. The backup requires 472.7 GB but only 465.3 GB are available."
Click to expand...

Why would this be? Other disks are excluded from the backup, and Time Machine is telling me that it needs more space than it actually needs. What should I do?

Thanks.
 
(I posted the following in another thread where this issue first started. I broke it off and created this thread because it was a different Time Machine issue than the original.)

A tribute to Mac OS X is the fact that I've never used RAID before and was able, in a few minutes, to set up a striped RAID (0) drive using two internal 500 GB drives, tell Time Machine to use the combined 1 TB drive for the backup volume, and get Time Machine backing up my startup volume.

Not to bash any other operating systems, but I'm not sure how easy this would have been if I were not using a Mac. Easy is the name of the game. It saves me time, frustration, and worry. It also saves those around me from the ranting that would occur if RAIDing weren't easier on a Mac. :)

I still think that requiring twice the size of the volume being backed up is a little overkill on Apple's part, but I've had this other internal drive sitting around as a Tiger clone since about a year ago when I upgraded to Leopard. I guess I can safely say that I won't be needing it any longer.

So, we'll see how it goes with my new RAID volume.
 
Had this same issue when doing a restore 2 nights ago. Solved it by this. Started time machine, opened options and added to "do not backup" the following file, under Mac HD there is a "users folder" on the bottom, Click that as the item to exclude. Have time machine do a backup, after that backup is done, go back into time machine and remove that same folder from the exclude, then do a second backup with time machine. U will find that time machine takes awhile to do this second backup, but the issues with not enough space do not appear and the backup is a success. Worked for me about 1 hr ago now, as i spent the last 2 days working on the damm thing. Hope this helps Has got to be something with the sparse-bundle file that is causing this issue with time machine.
 
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