Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.

rayward

macrumors 68000
Original poster
Mar 13, 2007
1,697
88
Houston, TX
Isn't Time Machine supposed to manage the size of the backup file, and delete older backups as necessary? When the backup tries to run as scheduled, I get a notification that it could not be completed as "there isn't enough space".

Is there a configuration I'm missing to have TM manage the backup file size? TIA
 

Bigwaff

Contributor
Sep 20, 2013
2,080
1,393
Is the volume of data on the source larger than the capacity of the TM backup drive/partition?
 

HobeSoundDarryl

macrumors G5
As Bigwaff's question implies, ideally you've allocated 2X-3X or more capacity of the total amount you want TM to backup. For example, if you have upwards of- say- 1TB to backup, you have allocated 2-3TBs or more for the TM volume on that QNAP.

If you have done that, then yes, TM should be deleting the oldest backups to make room for new backups once the max capacity is reached.

And here's some people with this kind of issue. Perhaps a solution can be found in those posts? There are MANY pages all over the website about this kind of issue, so there very well may be some bugs with TM itself. Do some searches, read what others have tried and maybe find an action that works for you.

Are you perhaps trying to use the same space as a prior Mac's TM backup? For example, old Mac has been backing up to this QNAP space and now you want new Mac to use the same space and/or perhaps (thinking you can use the) same backup to just takeover with a newer Mac? If an old Mac has eaten up a good chunk of free space, the new Mac doesn't have the space it needs to back up in what remains. You may find you have to delete any existing backup(s) to fully free up the TM space and then start a brand new TM backup. This may also be the ultimate remedy if the TM backup has become corrupted for some reason.

Lastly, QNAP has some configuration settings especially for TM. It's not a matter of just allocating a space and then selecting it for TM (software). If you didn't set QNAP up especially for TM, that may be the problem.
 
Last edited:

rayward

macrumors 68000
Original poster
Mar 13, 2007
1,697
88
Houston, TX
Lastly, QNAP has some configuration settings especially for TM. It's not a matter of just allocating a space and then selecting it for TM (software). If you didn't set QNAP up especially for TM, that may be the problem.
I did set up the NAS for TM backups, but your post reminded me that there was a firmware update installed last night. Need to go check if that changed any of the settings.
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.