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

I'm yet another. I installed a Synology 2-bay model 212j and started using it for time machines (Air, Mini).

Both have had failures requiring tossing all the old backups and having to start over. Its worse for the air, possibly due to mobile/intermittant connection?

I've also used DiskUtil which says the bundle is fine.

Is it better with Mountain Lion?

I'm surprised at Apple's non-response. Are they going to drop computers and move to phones, tablets and cloud only? What's up!?

BTW: Has anyone contacted Synology or any NAS mfgr to see if they have a suggestion?

-- Owen

Mountain Lion doesn't make any difference. I've completely given up on Time Machine and moved to CrashPlan as a pure backup solution. It's not exactly the same as Time Machine in that I can't go in and scan backwards through the state of the system, but I never really used TM for that anyway. I was just relying on it as a backup solution.

With CrashPlan backing my systems up to the NAS in the basement, and to CrashPlan's data center (fee-based service), I feel fairly confident that, if something goes wrong, I'll be able to recover.

This just happened to me after waiting 9 hours to do an initial backup 😟

This problem started for me when I upgrade to Mountain Lion. I shut time machine down for about a week and have started to use it again. No problems so far, for two days, but expect this to have again. If it does, will go to another program and save to an external hard drive for my MacBook Pro.

I am having the same problem with Mountain Lion and Time Capsule. I have Time capsule with 2 TB hard disk (1.7 TB is always available) yet every 3-4 weeks, I keep on getting the same error message. It is pretty frustrating.

Me too, as reported earlier.

But I've been following the problem a bit more closely. I've got two computers, a Mini desktop/server and a MBAir laptop using a Synology NAS with time machine support. I seem to get the error only with the MBA, not the Mini. Both running the latest version of Lion.

Might be good to collect similar stories to see if there are other correlations.

I've gone to Dropbox as my main day-to-day backup: source files, docs I make etc. And for photos, Arq with Amazon storage. So I view Apple as just too novice to depend on. TM is lovely and works enough of the time that I'll keep on with it too.

-- Owen

Hi all,

i wasn't really aware that this was a bug (yes i recently upgraded to mountain lion) so i clicked to make a new backup copy.

Ironically, one week later, i realize that i accidently deleted a VERY important folder with my thesis in it.

And yes, probably i did that just one day before i made a new backup copy.

So please tell me there is a way to retrieve this data, or did Mountain Lion just destroyed about 6 months of work?

I make backup's on a Synology ds110j, and i backup that Synology also everyday on another external disk via USB, just to avoid this scenario.

Can someone please tell me how to get that folder back??

I frequently get this error with my usb hdd connected to my Airport Extreme. I'm thinking about buying a Time Capsule. Does this error also occur as much on a Time Capsule?

Jouri wrote:

I frequently get this error with my usb hdd connected to my Airport Extreme. I'm thinking about buying a Time Capsule. Does this error also occur as much on a Time Capsule?

The TC has something that improves the reliability.. it seldom has this issue.. not that it is completely trouble free by any means.

Currently, have had the issue three times in a week. It's pretty exasperating...

lightknight wrote:

Currently, have had the issue three times in a week. It's pretty exasperating...

To a Time Capsule or something else??

If you need help with TC problems then we can often help or find work arounds.. but you should not be corrupting the TM backup very often at all.

Sadly, yes. It actually makes me a bit irritated, because TC is not exactly cheap...

Thanks for the offer of help, I'm actually considering doing a reinstallation (clean) of the Mac, but with Mac OS X 10.9 (Wild Whatever Chameleon Cat or anything they wanna name it...) probably coming soon, might want to wait ^^'

Jouri wrote:

I frequently get this error with my usb hdd connected to my Airport Extreme.

That's not surprising . . . backing-up that way is often unreliable and is not supported by Apple. See: Using Time Machine with an Airport Extreme Air Disk.

Backups to Time Capsules (or USB drives connected to them) are supported, and seem much more reliable.

However . . . it's always prudent to keep "secondary" backups, but especially so when your main ones are on a network. See Time Machine - Frequently Asked Question #27 for an explanation and some suggestions.

This explains what is going on and how to fix it:

http://apple.stackexchange.com/q/93215/50686

That's very unlikely. Backups via Airport Extremes are notorious for corruption, regardless of the size. That's why Apple doesn't support it.