12 Replies Latest reply: Feb 24, 2010 1:31 PM by Pierre Albarede
atonaldenim Level 1 Level 1 (0 points)
Trying to restore from a Time Machine backup for the first time.

I have a 1TB drive in my computer and a 1TB external drive, both about half full. I made a Time Machine backup for the first time onto the drive, and selectively excluded a LOT of stuff from being backed up, so the total amount of backed up data clocked in around 35GB according to the Time Machine control panel.

The disk I'm trying to restore the backup to is a 100GB partition. When I boot from the Snow Leopard install disc and attempt to Restore from Time Machine backup, after selecting the backup to restore from and the destination disk, I get the message "This disk does not have enough space to restore your system." Even though the amount of data in the backup is only 1/3 of the drive capacity?

Curiously, it does allow me to restore another Time Machine backup onto the 100GB drive, a 60GB backup from my Powerbook which is also stored on the 1TB external drive.

Does the destination drive capacity have to be equal to the source drive capacity, even when only a small amount of data is backed up? That wouldn't make much sense.

iMac 24" Early 2009, Mac OS X (10.6.2)
  • 1. Re: This disk does not have enough space to restore your system
    V.K. Level 9 Level 9 (56,120 points)
    atonaldenim wrote:
    Trying to restore from a Time Machine backup for the first time.

    I have a 1TB drive in my computer and a 1TB external drive, both about half full. I made a Time Machine backup for the first time onto the drive, and selectively excluded a LOT of stuff from being backed up, so the total amount of backed up data clocked in around 35GB according to the Time Machine control panel.

    The disk I'm trying to restore the backup to is a 100GB partition. When I boot from the Snow Leopard install disc and attempt to Restore from Time Machine backup, after selecting the backup to restore from and the destination disk, I get the message "This disk does not have enough space to restore your system." Even though the amount of data in the backup is only 1/3 of the drive capacity?

    Curiously, it does allow me to restore another Time Machine backup onto the 100GB drive, a 60GB backup from my Powerbook which is also stored on the 1TB external drive.

    Does the destination drive capacity have to be equal to the source drive capacity, even when only a small amount of data is backed up?

    no.
    That wouldn't make much sense.

    that certainly wouldn't make any sense and TM does not do that. something is wrong with your backups. you say you excluded a lot. are you sure that only 35Gb was included? check the size of the backup folder for a single backup on the TM drive. also, run "repair disk" with disk utility on both the source and the target drives. any errors there?
  • 2. Re: This disk does not have enough space to restore your system
    K T Level 7 Level 7 (23,700 points)
    Seen these?

    User Contributed Tips:
    Pondini - Time Machine - TROUBLESHOOTING (Sept 25, 2009)
    http://discussions.apple.com/thread.jspa?threadID=2057525
    Pondini - Time Machine -- Frequently Asked Questions (Apr 3, 2009)
    http://discussions.apple.com/thread.jspa?threadID=1964018
  • 3. Re: This disk does not have enough space to restore your system
    Julian Tyler Level 1 Level 1 (0 points)
    I guess snow leopard time machine changed, it now incorrectly stores the size of the source volume of the backups. When the snow leopard install disk, tries to restore, it just uses this value and compares it with the target of the restore and thus concludes it can't restore the backup due to insufficent space. If you have an old leopard time machine backup, select it with the snow leopard install disk restore "from timemachine" option and you'll see it spends ages calculating required space, different to one of the new snow leopard backups.

    To avoid this nasty bug, obtain a leopard install disk, and use it's restore function. It spends ages calculating the space required for the restore and thus isn't using the stored value that snow leopard time machine now stores.

    Message was edited by: Julian Tyler
  • 4. Re: This disk does not have enough space to restore your system
    Pondini Level 8 Level 8 (38,720 points)
    Julian Tyler wrote:
    I guess snow leopard time machine changed, it now incorrectly stores the size of the source volume of the backups.


    No, that's not what's happening -- there's something else going on.

    To avoid this nasty bug, obtain a leopard install disk, and use it's restore function. It spends ages calculating the space required for the restore and thus isn't using the stored value that snow leopard time machine now stores.


    Do NOT attempt to restore Snow Leopard backups with a Leopard disk. It will do it, but the resulting system will be useless -- it won't boot.
  • 5. Re: This disk does not have enough space to restore your system
    Glenn Carter Level 4 Level 4 (3,360 points)
    Actually, I'm finding that alot of users are not use to the new installation default - Replace & Install. Everyone is expecting the installer to erase the drive for them (as Leopard (10.5) did) when in fact it is NOT doing so. Then when they attempt to perform a migration they are told there is not enough room without realizing their legacy user accounts are STILL on the Mac and were never erased to begin with. Thus the message "There is not enough room..."
  • 6. Re: This disk does not have enough space to restore your system
    Pondini Level 8 Level 8 (38,720 points)
    That's true, when installing OSX. But these are doing full restores from Time Machine backups.
  • 7. Re: This disk does not have enough space to restore your system
    Glenn Carter Level 4 Level 4 (3,360 points)
    Nevertheless, I don't think the Erase Drive step is being accomplish when this option is selected.
  • 8. Re: This disk does not have enough space to restore your system
    Julian Tyler Level 1 Level 1 (0 points)
    Pondini:

    Well it storing something because it snow lopard install disk restore doesn't spend ages calculating the size of the snow leopard backup before restoring. I have excluding a few folders from the backup, which if stored on the backup would causes it to be bigger than my new SSD.

    Your right restoring with the leopard dvd, left me with some completely empty files in /bin /sbin which prevented booting.

    I have re partitioned and erased my disk before for each attempt. I also tried to use ditto in terminal booting via snow leopard install dvd, when rebooting, in verbose mode, it seems to error a bit and then turn off the computer, so I can't even see what the error is.
  • 9. Re: This disk does not have enough space to restore your system
    Glenn Carter Level 4 Level 4 (3,360 points)
    You are not the only one who has experienced problems with the Restore function in Snow Leopard. As an alternative. why don;t you simply go ahead and install the OS from the DVD and then when asked near the end, migrate your user data over form the Time Machine backup?
  • 10. Re: This disk does not have enough space to restore your system
    Julian Tyler Level 1 Level 1 (0 points)
    Because that is migrating, I have lots of unix software installed on my snow leopard disks, and files just not located in the user directory. I was hoping that Time Machine would work just as advertised. If the freaking install disk had strace on it I could determine where the **** time machine restore was getting it's incorrect infomation from.

    I was thinking of installing snow leopard on to a disk, and then using ditto to copy my backup over it. Or alternately putting my old hard disk into my computer, removing the excluded directories, repartioning the drive with boot camp, and then imaging the drive.
  • 11. Re: This disk does not have enough space to restore your system
    Julian Tyler Level 1 Level 1 (0 points)
    I finally gave up and end up booting of the old drive via usb and using carbon copy cloner to copy my files. There were some 20 gigs of difference between what CCC copied and what was in the time machine backup. Not so sure about trusting time machine any more.
  • 12. Re: This disk does not have enough space to restore your system
    Pierre Albarede Level 1 Level 1 (5 points)
    Hello,

    I tried to restore the system on internal drive (250 Go, target) by starting on DVD and using a Time Machine backup disk (250 Go, source). I also had the error message "This disk does not have enough space to restore your system." The target had about 70 Go free, while the source had about 30 Go free (due to saved history, of course).

    This is really bad : I do not see why restoring would not be possible and anyway, if so, there should be a warning BEFORE you ever need it.

    Thus, I tried to restore the system from the DVD. Even this did not work : the internal disk was not bootable.

    Eventually I completely erased the internal disk and made a clone from a CCC backup and it worked, of course, but without the CCC clone I would have been screwed up.

    My problem (no booting) was after installing Ubuntu on some external hard disk. GRUB was apparently installed on the internal disk boot partition and fooled EFI.