Deleting old backups on hard drive

Hi,
I think i've made a massive error.
I have a WD 1TB hard drive, and manually back it up every week or so. However, i noticed that there was only 10GB of space left on the hard drive. I then decided to open the backups.backupdb folder, and manually remove previous backups.
I put the first one into the trash, then realised i probably shouldn't have done this. i tried to click and drag the folder from the trash, back into the backups.backupdb folder, however, it says it can't be modified.
does anyone have any advice on what to do? i really don't want to reformat the hard drive because i've got 100's of GBs on there that i'd lose!
Thanks

About the only thing you can do, as far as I know, is to erase or repartition that drive with disk utility and then do a tm backup of your complete system. Fooling with the backups in that folder kind of forks all other backups. The oldest being the base that all others are based on. Once that is deleted I'm not sure you could ever restore your system from the others.
But for a full rundown on tm take a look at the pondini website. Sorry I don't have a link to it. Google pondini time machine.

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  • Time Machine - strange behavior while deleting old backups

    Not sure if this is the right place, because this is actually not on Time Capsule, but on a Time Machine on an external USB drive.
    In any case, I searched the web for "time machine delete old backups" and found many discussions of various aspects of this task. My objective is to clean up a partition on a the external drive that I no longer use for active TM backups, but to retain a small set of backups in case I need to go back to them. The partition now has other uses and I need the space. My main TM backup is now on a separate Time Capsule.
    So again my objective is not to remove all backups, but just most of them.
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    This procedure will remove one Backup at a time, and it seems to take 5 - 10 minutes for each backup.
    Here is what I noticed that was "strange":
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    For the first selected backup so deleted, there is a confirmation dialog with a warning message that it is not undoable.
    After clicking OK on the warning message, the display backs up to the "Present" backup, and the administrative password is requested.
    After the administrative password is entered, the backup starts but control is passed back to the user interface, and another backup can be selected to be deleted.
    However, after the second backup is selected and deleted, there is no warning dialog, and no request for the administrative password. At this point the user interface is busy and nothing more can be done until the backup delete is completed. Except that the Time Machine can be exited by first pressing Escape, then Cancel on the lower left of the screen.
    If the time machine is exited, there is a Delete Backups progress dialog with a progress bar for each backup  so far requested. If the second backup was requested, as in the steps above, there would be two backups.
    I discovered by playing around that either you had to wait within Time Machine for the deletion to complete, or alternatively exit Time Machine. While I was not sure what was going on, I kept starting one backup, then exiting Time Machine and re-entering Time Machine and requesting another delete operation. Each time after entering Time Machine, the warning/admin password sequence occurred and I was able to exit. And then immediately re-enter Time Machine and request another backup. Only by exiting and re-entering could another delete request be made.
    When out of Time Machine, I thus saw the Delete Backups dialog with any number of concurrent "Delete One Backup" progress bars.
    Because of the nature of the hard links used to indicate backups, I was wondering if these multiple delete operations could possibly be hung in a deadly embrace, so I decided to only do one at a time. Some further study to see if the multiple delete operations were all able to complete would be needed to know if this would be a good way to "queue up" multiple delete requests.
    Bottom line: seems like kind of an odd implementation. Would be really nice if you could select many (say 30) individual backups and delete them all at once, rather than taking 5 - 10 minutes each. Again, this is because I am trying to reclaim disk space, but not delete all the backups from a Time Machine backup set that is not in active use.
    Also, the method of "queuing up" backup delete requests is kind of odd, but seems to work, with the proviso that I have not yet confirmed that doing more than one at a time actually works.

    Heinz-G?uenter Arnold wrote:
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    That happens occasionally, in both Leopard and Snow Leopard, sometimes after something was deleted from the Finder, but also after an abnormal shutdown or improper disconnection of the TM disk.
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  • Will my files i saved using time machine still exist if i delete from my computers hard drive?

    I recently had a problem with my computer. I bought an external hard drive and used time machine to back up my 15in mac book pro before sending in for repair.
    I have gotten my computer back and needed to delete files from the hard drive on the computer ( close to capacity). Was I safe to do so knowing that everything is saved on my external?
    My concern is that if I plug in the external hard drive it will now see those files have been deleted from my computer and delete from the external as well.
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    Just wanted to add to this conversation - Time Machine will keep copies of your files for some time.  It is a backup system, after all.  Deleting the files from your main hard drive will not cause Time Machine to go and delete them from your backups.
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  • 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.
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    nerowolfe wrote:
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    That being said, as I asked in a post not too long ago, "how many have had a warning from TM that old backups are being deleted?" as one would expect when the TM preference box, "Warn when old backups are deleted" is checked.
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    mtx34 wrote:
    i have a western digital 1TB hard drive for my macbook and it is converted to a time machine. i just hooked it up and was curious how to change the backup times
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  • When Time Machine deletes old backups......

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    tomarm wrote:as I understand that only files no longer needed in other backups will be deleted. Is there any reason this approach should be avoided? Are there instructions on the best way to do this? Thanks.
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    12. TM like all HD-based data is subject to ferromagnetic and mechanical failure.
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