I have the same problem. My system is automatically receiving files over the network and archiving them to CD-R. I wanted a way to automatically determine in my own program when the CD-R would be full when selecting files to be put on the CD-R. For this to be accurate you need to know the filesystem overhead (as you clearly state). I tried looking at the mkisofs code to figure this out but it was more complicated than I was willing to do so instead I used the command "mkisofs -print-size <DIR>" to determine how big an ISO of that directory would be. I then compare it to my disc size, if there is more room I add another file. I do this in my program after each file I select to put on the CD-R to make sure I don't overrun the media size. This is terribly inefficent but I don't know what else to do. To help minimize the number of calls to -print-size I changed my program so I only call it after the size of the files equals 90%+ of the media size (only do accurate size check when rough size check is getting close to full). It is still slow but tolerable. Any other suggestions would be appreciated.
--- Pierre Duhem <[EMAIL PROTECTED]> wrote: > Hello Mike, > > MFM> Hey guys.. > MFM> Quick technical question... > MFM> I was under the impression that the > size that a filesystem took on the > MFM> disk varied, depending on the files/direcory > structure, but am now starting > MFM> to believe this is incorrect. > MFM> On a standard ISO9660 disk, is the > filesystem static in size, or does it vary? > > It varies, of course, depending on the number of > entries it has to > contain. But there is also a minimal size (16 empty > sectors, volume > descriptor, path tables, roo directory). That is, > the overhead for a > disk with 1 file and for say 15 files is the same. > > > > > -- > Best Regards > Pierre Duhem > Logiciels & Services Duhem, Paris (France) > [EMAIL PROTECTED] > > > -- > To UNSUBSCRIBE, email to > [EMAIL PROTECTED] > with a subject of "unsubscribe". Trouble? Contact > [EMAIL PROTECTED] > __________________________________________________ Do You Yahoo!? Yahoo! - Official partner of 2002 FIFA World Cup http://fifaworldcup.yahoo.com -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
