Dear Folks, On Fri, Jul 09, 2004 at 03:48:21PM +0200, Joerg Schilling wrote: > >From: scdbackup@gmx.net > > > >> have struck problems in calculating the space required. > > >Who doesn't ? > > >Currently i am undecided wether it is better to use > > mkisofs -print-size > >or the size obtained by function stat() plus 1400 bytes. > >(This number was found by try and error when i had to replace > >du -sk as size measurer for afio.) > > >Regrettably the size of an mksiofs output tree is not the sum > >of the sizes of its subtrees. Usually it is smaller but i had > >occasions when the backup became slightly larger than planned. > > The correct method is to use mkisofs -print-size everything else is > reading from the coffee grounds...... Oh dear, I so much prefer to drink tea :-) Seriously, giving mkisofs -print-size a long list of files to iteratively determine the number of files to include may possibly be suboptimal. So perhaps to solve the problem involves a thorough understanding of iso9660, Joliet and Rock Ridge standards. Oh dear, I was hoping someone might be able to spare me some of that. A quick look at the mkisofs code indicates that I won't be able to finish that before I have to go to work this morning. -- Nick Urbanik RHCE nicku(at)vtc.edu.hk Proud member of the Dept. of Information & Communications Technology, Home of Visual Paradigm: Jolt Productivity Award winner, programmed by our own graduates! Tel: (852) 2436 8576 Fax: (852) 2436 8526 GPG: 7FFA CDC7 5A77 0558 DC7A 790A 16DF EC5B BB9D 2C24 ID: BB9D2C24
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