daantje.nl

I’ve made a backup routine for my server. It produces 1 big tarball witch I split into chuncks of 4 Gigs. I thought I could make from one chunck one iso to put on my DVD. But every time I tried to make the iso, mkisofs was complaining that the file was too large - ignoring. First I thought it was because the iso was to large for my file system, but it didn’t, I use xfs and ext3 file systems. The ISO format doesn’t allow big files larger than 2 gigs in it’s contents. So the solution of making one big iso of 4 gigs, is split the tarbal in parts of 2 gigs so mkisofs can use them… The iso itself can be as large as you want, only the contents of the iso may not contain files larger than 2 Gigs! Cost me a week to figure this out… So simple, it’s not mkisofs whats doing it wrong, it’s the iso file format that doesn’t allow it!

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