How do you get a 712+MB file on a 700MB CD?

**FCizek** · 05-04-2003, 03:35 AM

OK, seems like no one else has had this problem, but KNOPPIX_V3.2-2003-04-18-EN.iso is 712MB plus. If I add a MB or 2 from my boot floppy, the files won’t burn to a 700MB CD.
What am I missing here?

**Stephen** · 05-04-2003, 04:05 AM

Originally Posted by FCizek

OK, seems like no one else has had this problem, but KNOPPIX_V3.2-2003-04-18-EN.iso is 712MB plus. If I add a MB or 2 from my boot floppy, the files won’t burn to a 700MB CD.
What am I missing here?

Those are bytes not MB it works out to under 700MB (696+MB) and you should not be adding any files when you try to burn the image.

**mabhatter** · 05-04-2003, 04:06 AM

The .iso should work just fine--it did for me. Realize that file downloads show actual number of bytes in most cases. There's 1,024 B in a KB, and 1,024 KB in a MB. Thats 1,048,576 Bytes in a MB. If you divide the numbers you'd see that it just barely fits. 697MB kinda barely! It's really squeezed in there.

Also, The disc is already bootable. It already has a boot image on it! You don't add anything to the iso--an iso is an exact disc copy. It has to burn on the disc exactly as the original was because the filesystem and blocks are copied not recreated.

**god** · 05-04-2003, 04:13 AM

make sure you burn the image to the disk... not the image ON the disk...

**rickenbacherus** · 05-04-2003, 06:31 AM

Originally Posted by FCizek

OK, seems like no one else has had this problem, but KNOPPIX_V3.2-2003-04-18-EN.iso is 712MB plus. If I add a MB or 2 from my boot floppy, the files won’t burn to a 700MB CD.
What am I missing here?

Perhaps you have never heard of overburning
A 700 MB cd can actually hold 703.125Mb. w/out overburning. IIRC some cdburners cannot handle overburning.

edit
It is possible to have overburning disabled.

**mabhatter** · 05-06-2003, 08:57 AM

Unless he's connected to that 'other' Klaus and can get me a new burner!

I still wonder why the ISO is over 650 MB? certain drives *cough*sony*cough* that people have refuse to burn more than exactly spec. I have no problems. Just don't mention that I saw 800? MB CDRs at the show over the weekend. What ever would you do? How would you use them anywhere else? Don't let Klaus read about this!

**garyng** · 05-06-2003, 09:31 AM

I still wonder why the ISO is over 650 MB?

Indeed, in order to have the broadest support(that is why all those scsi driver in the boot image), I prefer it to be within the 650MB envelope and the boot disk 1.44M(which is not a problem for KNOPPIX but many bootable linux CD lax that to 2.88M format and fail to boot on some old machines).