aarste Posted December 29, 2009 Posted December 29, 2009 I tried to burn a 4.37 GB MKV file to a DVD for storage (not for playback on a media device or such) and ImgBurn said I would not be able to fit this unless I did one of the 2 options, which I believe was to change the filesystem to UDF only, or the 2nd option - change the ISO9660 restriction to allow files to exceed the size limit. I went with the 2nd option and found that the md5 of the burned mkv file matched the one on my hard disk (which is all good). But the question is, can I expect any disadvantages from the change I made to fit this file onto DVD? Or is it just a "safety net" put in place into ImgBurn to prevent overburning or something like that? Windows 7 asked me upon inserting the disc if I wanted to treat this disc as an UDF drive or something similar which I cancelled out of, but can't seem to reproduce this prompt window again for some reason. File size of the MKV file is: 4.37 GB (4,694,314,392 bytes) Thanks
LIGHTNING UK! Posted December 29, 2009 Posted December 29, 2009 The ISO9660 file system only allocates 32bits for the size of a file, so the largest number (and therefore file size) it can possibly represent is 4294967295 (0xFFFFFFFF). So long as you include the UDF file system somewhere along the line, ImgBurn gives you the option of effectively truncating the size of the large file within the ISO9660 file system - because it can still be addressed and accessed in full via the UDF one (which is what the OS would use anyway as it's the best one). If you don't include UDF then your file will show up as 4294967295 bytes even if it's true size is double that. You won't be able to access any data in the file after that 4294967295 byte cut off point. This is nothing to do with overburning.
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