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Mac Forum / Country Specific / UK Mac Group / May 2008Time Machine question...
I have just been advised by my computer that the external disc which I used for my Time machine back-ups is nearly full - I've been using 200Gb external disc since last November with the default settings, so it's done quite well. The warning tells me that Time Machine will start to delete the oldest data on the back-up disc so my question is this... If I have not looked at a file - document, photo etc - since last November, will it now no longer be available via Time Machine? My thinking is that the document/photo would have been backed up to the external drive last November but there would be no incremental back-up since because there has been no change to the file. Or s Time Machine cleverer than I'm giving it credit for? Thanks... Jay > The warning tells me that Time Machine will start to delete the oldest > data on the back-up disc so my question is this... > If I have not looked at a file - document, photo etc - since last > November, will it now no longer be available via Time Machine? If you have *deleted* a file in November on your mac, and wish to get it back now (assuming TM needs to delete "everything November"), then you will have lost it. If you have left it on your mac, or deleted only later, then TM will keep it. Basically, the technical way TM deals with backups is a bit complex (dated folders with hard links pointing on a single file when no change, to save space) but seen from us, the end-users, the result is as if TM kept regularly separate backup copies of your data. Then when it deletes "November data", everything that was present in your mac *after November*, e. g. in December, is still there. (in the "december" folder)  SignatureFrédérique & Hervé Sainct, h.sainct@laposte.net [fr,es,en,it] Frédérique's initial is missing in front of the above address l'initiale de Frédérique manque devant l'adresse email ci-dessus > I have just been advised by my computer that the external disc which I > used for my Time machine back-ups is nearly full - I've been using > 200Gb external disc since last November with the default settings, so > it's done quite well. If you want to buy a bigger disk for use with TM, you will need to use SuperDuper! to clone the old TM disk across to it. Lesser tools (eg Finder) will not work correctly. > The warning tells me that Time Machine will start to delete the oldest > data on the back-up disc so my question is this... > If I have not looked at a file - document, photo etc - since last > November, will it now no longer be available via Time Machine? It'll still be there. > My thinking is that the document/photo would have been backed up to > the external drive last November but there would be no incremental > back-up since because there has been no change to the file. Or s Time > Machine cleverer than I'm giving it credit for? It is cleverer. Cheers, Chris > If you want to buy a bigger disk for use with TM, you will need to use > SuperDuper! to clone the old TM disk across to it. Lesser tools (eg > Finder) will not work correctly. or a terminal command with sudo that'd respect the file ownerships SignatureFrédérique & Hervé Sainct, h.sainct@laposte.net [fr,es,en,it] Frédérique's initial is missing in front of the above address l'initiale de Frédérique manque devant l'adresse email ci-dessus On 2008-05-25 14:50:29 +0100, h.sainct@laposte.net.invalid (Frédérique & Hervé Sainct) said: >> If you want to buy a bigger disk for use with TM, you will need to use >> SuperDuper! to clone the old TM disk across to it. Lesser tools (eg >> Finder) will not work correctly. > > or a terminal command with sudo that'd respect the file ownerships I wouldn't bother wasting time trying to find stuff that preserves stuff like ACLs, and more importantly can handle hard-linked directories. SuperDuper! works, in free mode. Cheers, Chris On 25/05/2008, Jay wrote in message <c3c244f7-1885-4326-ad39- 955ef57e0d98@c65g2000hsa.googlegroups.com>: > The warning tells me that Time Machine will start to delete the oldest > data on the back-up disc so my question is this... > If I have not looked at a file - document, photo etc - since last > November, will it now no longer be available via Time Machine? It first deletes files which have multiple, oldest copies. The only way it can delete every copy of one of your files is for your Time Machine partition to be smaller than the partition it's backing up. Simon. Signaturehttp://www.hearsay.demon.co.uk > My thinking is that the document/photo would have been backed up to > the external drive last November but there would be no incremental [quoted text clipped - 4 lines] > > Jay It deletes the old backup. If you check the Time Machine drive you will find something like "latest" and when you go to that folder it is the most up to date back of ALL your stuff. I have a 500GB drive and the latest backup is 300GB yet if I go to a folder dated a month ago it too appears to be 300GB Time machine appears to be very smart :) SignatureDavid DigMo! Main RSS : http://www.digmo.co.uk/feed Moving Image RSS :http://www.digmo.co.uk/category/mia/feed Music RSS : http://www.digmo.co.uk/category/music/feed |
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