Time Machine keeps asking to create new backup?

Question

Every time a backup completes I get this message -

'Time Machine completed a verification of your backups. To improve reliability, Time Machine must create a new backup for you.'

I am backing up to Lacie Network Space 2 drive via wifi.

Does anybody know how to correct this?

Answer 1

Connect to your external hard drive via USB, Firewire, or Thunderbolt.

Problems can occur when backing up over a network connection that corrupt the time machine backup.

This apple support communities discussion ended menitoning the Airport Extreme Base Station as a possible cause of the problem.

This site goes into more detail about the error message.

Time Machine locks the sparse bundle containing your network backups, and marks it as damaged. You may be able to view and restore some things from these backups, but you will not be able to continue backing-up to them. Disk Utility may appear to repair them, but they’re still damaged and if you try to back up to them again, you’ll just get the same message again.

Answer 2

I've been having this problem since upgrading to Lion. Perhaps interesting and related, my iMac using a wired network connection does not exhibit this problem while the two MacBook Pro's connected over wireless do have this problem.

I've been able to successfully fix this following these instructions: Fix Time Machine Sparsebundle NAS Based Backup Errors. Unfortunately it'll fix it for a few backups then the problem pops up again and I need to run through the same fix again.