Matt Connolly's Blog

my brain dumps here…

Time machine wants to do another full backup

My MacBook Pro had a weird problem where the hard-drive suddenly became full (when there should have been about 80GB free) and subsequently failed to boot.

No problems, out comes the install disc. Erase the drive and restore from last time machine backup.

Everything was perfect for a few days, then suddenly, Time Machine wants to do a full backup – I don’t know why – and has deleted all the older backups to make space for a new full backup. There isn’t space, so it’s now stuck in a Failed state.

Is there a way to reset the link between the computer and the TM drive so it can do an incremental backup again?

Or do I have to erase the computer and do a full restore?
Or erase the TM drive to do a full backup? (which is better in this case)

Thanks,
Matt

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