Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!ucbvax!agate!shelby!polya!kaufman From: kaufman@polya.Stanford.EDU (Marc T. Kaufman) Newsgroups: comp.sys.mac.programmer Subject: Re: Apple HD SC Setup partitionning Message-ID: <9029@polya.Stanford.EDU> Date: 8 May 89 05:43:01 GMT References: <892@cnetlu.UUCP> <12994@pasteur.Berkeley.EDU> <24232@coherent.com> <1580@internal.Apple.COM> Sender: Marc T. Kaufman Reply-To: kaufman@polya.Stanford.EDU (Marc T. Kaufman) Organization: Stanford University Lines: 24 In article <1580@internal.Apple.COM> alan@Apple.COM (Alan Mimms) writes: >In article <24232@coherent.com> dplatt@coherent.com (Dave Platt) writes: ->If you have used a backup utility that performs an "image mode" ->backup/dump of your Mac file-system, you *MUST* restore it into a ->partition of at least equal size. If you've dumped 21 megs of stuff to ^^^^^^^^^^^^^^^^^^^ ->a DC-2000 streaming tape, and then try to restore it into a partition ->that's only 20.9 megs in size... well, sorry, Charlie. >Actually -- you MUST restore to a partition which EXACTLY the same >size. The file system really needs this to be true. No, it doesn't. The file system doesn't know anything about partition sizes. The file system looks in its own header blocks. A Mac file system can be restored to any partition AT LEAST as big as the file system needs. Of course, all the area at the end of the partition will be unused, and unusable, since a Mac file system cannot change sizes once formed. It is possible that Apple's Tape Backup/Restore program enforces the size requirement -- I haven't checked -- but I have restored file systems from image copies into larger partitions with no problem. Marc Kaufman (kaufman@polya.stanford.edu)