Time Machine - mysteriously large Backup?!

I use Time Machine for hourly backups to a TimeCapsule. The most recent BU seemed to be taking a long time (most of mine are far less than 1GB), and after checking the progress, found it was trying to do a 28GB BU. I have no explanation for this, and checked the available space on my Mac's drive, but was about where I expected it to be (No additional mysterious 28 GB added to it).
Any ideas on what this could mean, or ways to investigate what the TimeMachine is attempting to BU?
Thanks!

Howdy -
I don't know what those are, and I can't imagine anything I have that would produce that much data. I did, however, do a shutdown and restart (afer stopping the backup attempt), and things seem to be normal again.
Thanks for the response - I'll be back here if things get wacky again...

Similar Messages

Time Machine - mysteriously large BU attempt?!

I use Time Machine for hourly backups to a TimeCapsule. The most recent BU seemed to be taking a long time (most of mine are far less than 1GB), and after checking the progress, found it was trying to do a 28GB BU. I have no explanation for this, and checked the available space on my Mac's drive, but was about where I expected it to be (No additional mysterious 28 GB added to it).
Any ideas on what this could mean, or ways to investigate what the TimeMachine is attempting to BU?
Thanks!

Hi,
There is a section of the Leopard forums specifically for Time Machine, you'll find it there because TM is part of Leopard and Snow Leopard. I'd recommend a couple of things first is reading both Time Machine FAQs & Pondini Time Machine Troubleshooting. If you still don't have luck you can find the forum by clicking Apple Support Communities, typing Leopard in the search box and narrowing your search by clicking the Refine this List box.
Roger

Time Machine Very Large Backup Space Requirements

I'm having a bit of trouble with Time Machine. I recently recreated a User Account. The old User account's home library permissions had become corrupt. Rather than try to sort through the permissions, I opted to just move all the personal data to another account (the primary admin), delete the old user account, recreate it, and move all the personal data to the new account. This worked splendidly. However, now Time Machine claims it needs about 2.1 TB to do it's next backup. I find this odd because a full backup is estimated as only 384 GB, and the computer's hard drive is only 1 TB to begin with. So, it needs a factor of 2 more space than is available on the computer. So, there is something amiss. I imagine Time Machine tracked the data being moved to the admin account and to the new account, and it wants to back all of this up. I don't want it to do that. Is there someway to cause Time Machine to forget the most recent changes?
Clearly, I don't want Time Machine to not backup the new account's information. However, I'm would like not to loose the previous backups. Any solutions?

Hello again:
Erasing and then formatting the Time Machine volume and having Time Machine make a new backup would be the way I would do it.
As an aside, I use two external hard drives. I have Time Machine set to make alternating backups on the externals, and I also make a bootable clone (SuperDuper!) on one of the externals. Short of a meltdown, I am reasonably well protected.
Barry

Time Machine Error. Backup is too large for the backup disk. Backup requires 289.28 GB but only 177.01 GB are available.

My Mac has not been backing up for some time. Tried Apple Support, but couldn't figure out problem.
Receive the following error...
Time Machine Error
This backup is too large for the backup disk. The backup requires 289.28 GB but only 177.03 GB are available.

See #C4 in Time Machine - Troubleshooting.
If that doesn't clarify the situation, post back with:
How much data is on your internal HD (and any others being backed-up)?
How large is your Time Capsule?
Is there anything else on the TC besides these backups? If so, what and how large?

Time Machine Error This backup is too large for the backup disk

Hi, I have a 1TB Time Capsule which backs up my Mac. I was having some issues with my mac so I decided to perform an erase and install and then use Migration Assistant to transfer everything back to my Mac.
After I reinstalled Snow Leopard and restored my Mac using Migration Assistant, Time Machine says that the backup has failed. It says " Time Machine Error This backup is too large for the backup disk. The Backup requires 663 GB but only 255 GB are available.
What do I do? Is my only option to erase my Time Capsule and have it back everything up from scratch?

Hi, thanks for the help. I erased everything off of the Time Capsule and it's backing up my Mac from scratch. It's almost finished backing up my whole mac. It's now at 641.86gb of 646.54gb but it's now backing up very slowly. It's backing up .1 every few minutes. Is this normal?
Here's the log from Time Machine Buddy:
Starting standard backup
Attempting to mount network destination using URL: afp://Stuart%[email protected]/Time%20Capsule
Mounted network destination using URL: afp://Stuart%[email protected]/Time%20Capsule
Creating disk image /Volumes/Time Capsule/StuartsMacPro.sparsebundle
QUICKCHECK ONLY; FILESYSTEM CLEAN
Disk image /Volumes/Time Capsule/StuartsMacPro.sparsebundle mounted at: /Volumes/Time Machine Backups
Backing up to: /Volumes/Time Machine Backups/Backups.backupdb
Ownership is disabled on the backup destination volume. Enabling.
Detected system migration from: /Volumes/My Book
Backup content size: 850.0 GB excluded items size: 606.5 GB for volume Stuart's Drive
Backup content size: 425.9 GB excluded items size: 67.3 GB for volume Macintosh HD
No pre-backup thinning needed: 722.56 GB requested (including padding), 928.68 GB available
Waiting for index to be ready (101)
Copied 28.3 GB of 602.1 GB, 29340 of 1478089 items
Copied 55.0 GB of 602.1 GB, 41596 of 1478089 items
Copied 82.9 GB of 602.1 GB, 55899 of 1478089 items
Copied 110.7 GB of 602.1 GB, 63347 of 1478089 items
Copied 138.8 GB of 602.1 GB, 83831 of 1478089 items
Copied 166.8 GB of 602.1 GB, 94574 of 1478089 items
Copied 194.7 GB of 602.1 GB, 102854 of 1478089 items
Copied 222.8 GB of 602.1 GB, 114388 of 1478089 items
Copied 129159 files (242.5 GB) from volume Stuart's Drive.
Copied 248.4 GB of 602.1 GB, 130414 of 1478089 items
Copied 265.5 GB of 602.1 GB, 355699 of 1478089 items
Copied 293.6 GB of 602.1 GB, 382912 of 1478089 items
Copied 322.1 GB of 602.1 GB, 387974 of 1478089 items
Copied 349.8 GB of 602.1 GB, 399204 of 1478089 items
Copied 378.3 GB of 602.1 GB, 399358 of 1478089 items
Copied 406.9 GB of 602.1 GB, 399441 of 1478089 items
Copied 434.5 GB of 602.1 GB, 415817 of 1478089 items
Copied 461.5 GB of 602.1 GB, 471528 of 1478089 items
Copied 488.2 GB of 602.1 GB, 537277 of 1478089 items
Copied 515.1 GB of 602.1 GB, 580446 of 1478089 items
Copied 541.3 GB of 602.1 GB, 590386 of 1478089 items
Copied 566.8 GB of 602.1 GB, 602496 of 1478089 items
Copied 593.3 GB of 602.1 GB, 649575 of 1
Message was edited by: Stuart Lawrence
Message was edited by: Stuart Lawrence

Time Machine says the backup is too large but it is not

Time Machine says the backup is too large but it is not.
While it is true my hard drive is very full (150 Gb used of the available 160Gb), this is way less than 42 Pb!!!!
I have tried numerous time to reset it and still the same issue.
Here is the reoccurring message:
Advice?

PB.. what the heck is a PB.. I kind of thought TB are still in fairly low digits.
Do a disk verify.. something is seriously stupidly wrong.. Otherwise ring Apple support and give them an earful about nonsense popups.
http://pondini.org/TM/Troubleshooting.html A5

Time machine won't backup, yet plenty of space & not much used on Mac HD

Well, this is yet another "Time machine won't backup becuase there is not enough space" thread. I have searched Google and threads here but it's still a mystery why this error is occurring and it seems there is no clear solution. I also looked at the Apple Time Machine errors FAQ as well.
Here are my specs and what I have tried so far.
2010 Mac Pro Quad Core with 1 TB hard drive with 12 GB RAM. (137 GB used so far on internal Mac hard drive disk, so about 863 GB free space).
- New external 1 TB hard drive initialized as Time Machine backup disk when inserted for the first time.
The exact error I am getting is this: "This backup is too large for the backup disk. The backup requires 1.80 TB but only 999.20 GB are available."
I have tried deleting the Time Machine system preference, reinitializing the external disk, clearing the system caches with Cocktail, restarting and letting Time machine ask me all over again if I wanted to use the external drive for Time Machine. Still the same error.
My question is how on earth can 1.80 TB be required for the backup when I only have 137 GB of used space?

danomatic12 wrote:
My question is how on earth can 1.80 TB be required for the backup when I only have 137 GB of used space?
Two possibilities:
There's another disk (or disks) connected to your Mac. If they're formatted HFS+, Time Machine is trying to back it/them up as well. You can exclude them per #10 in [Time Machine - Frequently Asked Questions|http://web.me.com/pondini/Time_Machine/FAQ.html] (or use the link in *User Tips* at the top of this forum). The 1.8 TB includes 20% for temporary workspace on the TM drive, so TM is estimating the backup at about 1.5 TB.
Something on your internal HD is corrupted, causing an incorrect calculation. Verify your internal HD, per #6 in [Formatting, Partitioning, Verifying, and Repairing Disks|http://web.me.com/pondini/AppleTips/DU.html] (or use the link in *User Tips* at the top of the +Using Snow Leopard+ forum).

Doesn't Time Machine delete old backups when it needs more space?

I've had time machine running for a long time now. It worked flawlessly for quite some time.
Today it gave me the error that there was not enough free space on the disk to complete the backup (the error message says something like there is 360 GB of data on the Time Machine drive already, 140 GB of free space and it would require more than that to complete my backup). I have a 500 GB Time Machine disk and my Mac has a 500 GB hard drive, so I should technically never run out of space.
The Time Machine almost acts like this is the first time I've ever backed up, which is not true. Shouldn't Time Machine delete old backups to make space for the new? What's even weirder is that if I open the "Star Wars" window of Time Machine I only see one backup from March 31, 2011, but I have been running Time Machine for well over a year now. I'm totally confused as to what happened. Any advice on how to get my Time Machine back up and running (without buying a new drive) would help!

You see only one backup in the Time Machine window because Time Machine has deleted the older backups to make space to do the current backup.
Time machine needs some working space to do its backups, and so backing up a 500GB drive onto a 500GB time machine volume is not ideal.
However, I do essentially the same thing, and what I do, when I have this problem, is exclude things from the backup.
First off, figure out what you changed. If you moved things from one partition to another, then that will cause a backup of the size of the thing that was moved. This may be why you have a large backup.
When I have this problem, I exclude large things that have changed recently from the backup. This makes the backup smaller, and means that there is less working space needed. I do this until I get a successful backup. Then I remove things, one by one, from the exclusion list, and back up after each one.
So, for instance if you just put 4 new folders on your drive, each of which s 20GB of data and they are named A, B, C and D, add all four to the exclusion list, do a backup, then remove A from the exclusion list (leaving B, C & D on it) and do a backup, and continue like this, adding 20GB of backup data each time until none of the new data is on the exclusion list and you get a completed backup.
Another possible issue, if you use multiple partitions, is that Time Machine may be keeping an obsolete backup of a partition that you previously reformatted. To see if this is the case, go into time machine (The universe interface) and go back to the most recent backup it shows. Click on your computer and see what partitions show up-- are any of them old ones that have been reformatted and renamed? You may be storing a duplicate backup because Time Machine does not realize that the disk that went away isn't coming back (because it has been reformatted as a different partition)
You can right-click on these items and remove them from your backup by sleecting "Delete all backups of...." This will free up space as well.

How does Time Machine handle large files?

I'm relatively new at the whole Time Capsule / Time Machine process and have learned that large files (eg aperture library) are backed up each time there is a change and this can lead to the TC filling up quicker than normal.
How does this work with daily and weekly backups?
For example, if my aperture library is, say 1Gb and I import a load of photos from my camera and this goes up to 2Gb. I've learned that I should disable time machine while I'm in Aperture (or at least before 10.6...not sure now). So given I've done that, imported the files to Aperture but want to edit them later and ultimately move them into iPhoto to keep the Aperture album small.
When I turn back on Time Machine, the next hourly backup will know the library has changed and will back it up, this will go on until a day backup has been taken - this deletes the 24 hourly backups? or does it merge them?
If I then do the editing the following week, then export the photos and the library is now back to 1Gb again....backed up hourly/daily/weekly etc what am I left with??
Do I have an original, the 2GB version and the new 1Gb version...ie 4Gb......is there a cunning way I can work to change the files within a week so only one of the changes is in the backup?

Orpheus999 wrote:
When I turn back on Time Machine, the next hourly backup will know the library has changed and will back it up, this will go on until a day backup has been taken - this deletes the 24 hourly backups? or does it merge them?
The Time Machine panel of System Preferences says this:
Time Machine keeps
- Hourly backup for the past 24 hours
- Daily backups for the past month
- Weekly backups until your backup disk is full
Each time Time Machine runs it creates what appears to be an entirely new backup set, although it does this in a way that doesn't require it to copy files that have already been copied. So merging isn't necessary. Another effect of how it operates is that each unique version of a file (as opposed to packages of files) only exists on the backup volume once.
According to the contents of my Time Machine backup file, hourly backups are literally kept for 24 hours, not until the next "daily" backup. For a "daily" backup, it seems to keep the oldest "hourly" backup for a day.
If I then do the editing the following week, then export the photos and the library is now back to 1Gb again....backed up hourly/daily/weekly etc what am I left with??
Do I have an original, the 2GB version and the new 1Gb version...ie 4Gb......is there a cunning way I can work to change the files within a week so only one of the changes is in the backup?
You might be able to exclude those files from being backed up at certain times, but I can't be sure this would result in older copied of those files being retained.

Time machine makes 30 backups for the last two days, no backups for any earlier times: is there a way to control it?

I've been running Time Machine in the background for as long as I've owned my current Mac--- a few months. It is a completely generic set-up: it's a desktop (rarely shut off or asleep) connected to an external hard drive that is much larger (1 TB) than my internal hard drive (0.5 TB), and Time Machine is configured to save backups of my whole internal drive to the external drive. The external is half-full, and the internal is a little more than half-full. I often hear my external crunching away, working on something.
I recently needed to access an old file, so I went into Time Machine mode on the folder where it had been deleted a few weeks ago. While I'm not upset that it isn't available (it's my own fault for deleting it), I didn't expect the Time Machine to have such a bad distribution of saved backups. There are 30 backup snapshots of the past two days, and nothing earlier. I was expecting something more like a few from today, a few from this week, a few from this month, and a few going all the way back in time--- a broader distribution.
I don't see any way to control this in the Time Machine Preferences (in fact, very little control at all). Is there a secret way to control it, or some tip to ensure a more useful distribution of saved snapshots?
Thanks,
-- Jim

Thanks, but it doesn't exactly address my question. TimeMachineEditor allows me to set the intervals or times when backups occur, but it doesn't control the algorithm that decides which snapshots should be deleted. My problem was that Time Machine chose to delete all of the old snapshots and keep only the most recent ones: I'd like it to keep more of the recent ones than the old ones, but still keep some old ones.
In fact, the (unmodifyable) text on the Time Machine control panel says that it keeps:
hourly backups for the past 24 hours
daily backups for the past month
weekly backups for all previous months
That would be perfect if it were true.
Perhaps the algorithm did the wrong thing because the size of my internal hard drive varied quite a lot a few days ago: a process got out of control and used up all of my internal disk space. I killed the process and deleted its output (several times), so my internal disk eventually went back down to normal. Perhaps in the intervening hours, Time Machine made a backup, once an hour, and used up all of the external drive space. When it had to choose between keeping "weekly backups of previous months" and "hourly backups of the past 24 hours", it chose to keep hourly backups of the past 24 hours. This was the wrong choice in my case (it was the unwanted output) and is probably the wrong choice in most cases.
Is there a way to control the algorithm that decides which backups to keep and which to delete? I would have it delete the hourly, daily, and weekly backups in a way that preserves their relative distribution.
By the way, while I have made it sound like my problem was a runaway log file (something that would be easy to put in an excluded directory with Time Machine's "Options" button), it was a VirtualBox snapshot merge. The data in question are precious, but were unnecessarily copied many times while VirtualBox failed to merge them properly. I can't simply exclude a directory: I'm talking about a more general problem.
Thanks!
-- Jim

Time Machine making full backups--not incremental

Hi,
I just installed Snow Leopard on my Mac Pro a couple of days ago, and have been using Time Machine to make backups (never used it before now). I have TimeMachineEditor installed, and have it set to make a backup daily at 3:30am. It backs up data from my 500GB main hard drive to another internal 500GB hard drive.
The first backup went without a hitch, and did a full backup as expected (everything). But the second, third, and fourth backups all were full backups as well....not incremental as they should've been. The fourth one was actually a manual backup I did to test it...I chose "Back Up Now" to see if it did full or incremental. It did a full backup.
So, after four backups, each a little over 100GB, I'm already running out of space Has anyone else run into this behaviour? Is this a consequence of TimeMachineEditor having screwed it up somehow? Even if it has, shouldn't a manual backup still do an incremental backup?
Very strange....

canadavenyc wrote:
V.K. wrote:
yes, well, if Toronto ever gets a team in any sport worth rooting for, I might stop posting on apple forums and start watching them.
lol...well, seeing as how you'll clearly be here a while then... ...perhaps I can prevail upon you to answer one last question that just occurred to me.
Let's say I have tons of TM snapshots on my backup drive, and at some point I want to delete a few to clear some space. I know TM automatically goes after the earliest ones when the drive fills up,
You should know that TM also constantly thins recent backups. It keeps hourly backups for 24 hours and then deletes all but one for every day; it keeps daily backups for 30 days and then deletes all but one for every week. it keeps all weekly backups till the TM drive gets full at which point it starts deleting the oldest ones.
but let's say I manually want to delete a few snapshots that contain, say, a massive cache file or something totally useless to keep around, which I could afford to delete and would gain me a lot more drive space.
When I go into the TM interface to do the removal, how can I figure out which snapshots to get rid of? How would you do it?
TM offers two options. you can delete an entire backup corresponding to a time point or it can delete all backups of a given file/folder. to do that enter TM and scroll back in time to some time point. select something and click on the "gears" action button in Finder toolbar. you'll see options "delete backup" (deletes the entire backup for that time point), and 'delete all backups of this item". deletes all backups of the selected item from all time points. I use the latter sometimes to get rid of backups of very large files.

Carbon Clone and Time Machine: developing a backup plan

Howdy all!
This is a second post that sort of flows on from another I have written today
https://discussions.apple.com/thread/4649740
I initally put them all together, but they were too rambling and disconnected, so it seemed better to seperate them. The question I have here is how best to organise my backup plan? I have a few ideas, but, basically, want to make sure I get the whole setup right the first time and would appreciate any advice from others that have been down the path before. As I am still waiting for some parts to arrive in the mail, I have a little time to think about how to go about setting up my Mac.
Basically the setup is:
Mac Mini 2012, boot drive is a Samsung 256GB 830 series SSD, seconday drive for data is a 1TB mechanical disk. I plan on having all my data on the seconday mechanical disk (photos, movies, music etc) and only the OS and Applications on the SSD. To this end, I understand I only have to move /Users to the mechanical disk to achieve this. I then also have 2x 2TB Western Digital MyBook Essential USB 3 disks for Time Machine backups. I plan on rotating them on a weekly basis (storing the disk not in use in a safe or offsite), and then, depending on costs a cloud backup service for some data (music, photos etc) which I might want to access when im not at home.
So I have been thinking for a few days now on the benefit of having a Carbon Clone bootable recovery drive. The thinking goes along these lines. As my data is on a seperate drive, and is backed up to Time Machine, in the event of an OS disk failure, I can replace the disk and then point /Users to the new drive, and I can be up and running once I have reinstalled the apps i need. Now, I understand the idea of the Carbon Clone backup is such that it speeds up the time to rebuild the OS disk, but I have to question, how useful is this in reality?
Consider, I can sit down now and write down all the apps I have needed in the past, install Mac OS, set it up (possibly with a generic admin password), install the apps I need from the App store and DVDs etc and then take a Carbon Clone at this point before any setup of Apps are done. If the apps configuration is backed up in the Time Machine backup (i.e.: the config files exist under /Users) then this is almost workable - in a recovery situation, the CC clone is used to rebuild the OS drive, the config files are pulled from the TM backups, and we're back up and running. Where this fails, is if I have installed (or removed) apps since the CC clone was made. At this point then, is it best to (a) make a new clone when a new app is added/removed or (b) make a note of apps added/removed, which will then have to be reinstalled if a recovery is required. I tend to think the (b) method is best here, as it preserves the integrity of the clone. If the machine has been compromised (malware etc) then remaking the clone, causes the clone to be compromised and hence the reinstalled machine as well. Though this method could be a pain if the machine state has changed somewhat over time. Also, it means that the reinstalled system will be missing updates etc which could be time consuming to apply anyway, so the usefulness of a clone is slightly reduced anyway.
Does anyone have any thoughts on this? Some days I think having a clone will be useful esp. as most of my software was delivered on CD (Adobe Creative Suite, Office) or are large install bases (XCode), but other days I think, "its not a mission critical machine", i can survive a day without it while I rebuild the install, and so I dont achieve much by having a clone which is likely out-of-date by the time I go to use it.
Also, in this backup plan, is it best to rely on TM for things like email backup or a dedicated mail backup utility? can a Carbon Clone exist on the same disk as Time Machine uses, or do I need to invest in a new disk or two for the CC clones?
As I say, I want to make sure I have this machine setup right from the start, and would really appreciate any pointers, tips or advice.

There is one big advantage of a clone. You can immediately reboot
to it and continue working and deal with the regular boot drive faiure,
what ever it may be, later. Especially since all your data and such
is on another drive. If you use your computer for work and time
critical projects, this is a major plus!
In the case of a hard drive failure/replacement, copying the clone
to the drive is the fastest way to get the system and all your settings
back.
Time Machine and incremental backups have a place as well. It is best
suited for "incremental" problems. Examples are installing an upgrade to
software that doesn't work or just don't plain like. With Time Machine it
is easy to just restore back to the point before the install.
Something else I do is backup current project files to USB memory sticks.
If you are using your computer for business, you can never have too many
backups. Coralllary 456 of Murphy's Law is the "number of backups that
you need will be one more than what you have!"

Time machine refuses to backup any more

Been using time machine for a long time now. Backing up 100GB or so to a 300GB external disk for the past few months. The disk in question is used exclusively for time machine.
This morning I get this error:
time machine error this backup is too large for the backup volume. The backup requires 11.7 GB but only 3.4 GB are available.
This is correct, but I thought the whole point was that time machine will just delete previous backups.
Do I have any option other than to re-format the disk, thus losing ALL previous backups?

Do you have the +Warn when old backups are deleted+ box in TM Preferences > Options checked?
If so, un-check it, and TM will begin deleting old backups when it needs room for new ones.
If not, TM may have started a new "sequence" of backups, as if you'd gotten a new Mac. This can leave the old backups "stranded," since TM on one Mac won't delete the backups from (what it thinks is) a different Mac.
Have you done any of the following lately: Had certain hardware repairs, especially a new internal HD or logic board; done a full restore; changed your computer's name via System Preferences > Sharing?

Time machine error: doesnt backup due a wrong calculation of space availab

296.4 GB are bigger than 6.8 GB, isnt it?
well, time machine is not doing the backup because detects that 296.4GB are lower than 6.8GB !!!
Time machine error:
This backup is too large for the backup volume. The backup requires 6.8 GB but onlye 296.4 GB are available.
To select a lrger volume, or to make the backup smaller by excluding files, open sustem preferences and chose Time Machine
any idea how to correct this error?
thanks a lot

296.4 GB are bigger than 6.8 GB, isnt it?
well, time machine is not doing the backup because detects that 296.4GB are lower than 6.8GB !!!
Time machine error:
This backup is too large for the backup volume. The backup requires 6.8 GB but onlye 296.4 GB are available.
To select a lrger volume, or to make the backup smaller by excluding files, open sustem preferences and chose Time Machine
any idea how to correct this error?
thanks a lot

Time Machine won't backup... because there's too much free space??

Hi all,
I'm getting a strange error from Time Machine:
"*Time Machine Error*
This backup is too large for the backup volume. The backup requires 147.8 MB but only 506.8 MB are available.
To select a larger volume, or make the backup smaller by excluding files, open System Preferences and choose Time Machine."
I should probably also note that, according to Finder, my Time Machine volume has only 27.5 MB available out of 182.89 GB.
I'm confused!
Thanks in advance,
Mike

Hi all,
Update: The same Time Machine Error message has just popped up again, only this time it says, "The backup requires 173.2 MB but only 823.1 MB are available."
Now I'm even more confused!
Thanks in advance (again),
Mike

Time Machine - mysteriously large Backup?!

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