Hi there,

I am backuping (does this word really exist?^^) some files. I put the files in folders called "DVD1", "DVD2", etc. Then I created iso files by using:
When I try to burn them by using
I get the error message:
[quote]Track 01: data 4522 MB
Total size: 4522 MB = 2315733 sectors
Current Secsize: 2048
Blocks total: 2295104 Blocks current: 2295104 Blocks remaining: -20629
cdrecord: Data does not fit on current disk.[/code]
I already removed some of the files so the iso gets smaller. I am now at 4522 MB and I think, there must be something wrong. The dvd should have 4.7 GB space.

Anybody know, how to fix this?

I am running Slackware 13.0, cdrecords/mkisofs version is "Cdrecord-ProDVD-ProBD-Clone 2.01.01a57 (i686-pc-linux-gnu) Copyright (C) 1995-2009 Jörg Schilling".


Thanks

You don't get 4.7 GB on a DVD 5 disc, you get about 4.3 GB maximum.

In my experience of making ISOs I've run into the same problem as you. What's actually on the DVD disk is around 4400MB. So it's a good idea to keep below that threshold.

edit:
4400MB/(1024MB/GB) = 4.29 GB

.. what smoker said.

For what it's worth, you don't get 8.5 GB on a double layer either. I've found anything over 8.1 gives problems, so I stick to 8GB.

omg... You're right. With only 4 gb isos it works.
It really sucks that they write 4.7 gb and you don't have really 4.7. You neither have 4.6 nor 4.5 gb...

Thank you for your answers.

Between the manufacturers version of GB, and the inevitable space taken up by the filesystem, you will always get less than it's advertised as. My 8GB flashdrive only has 7.5GB usable too.

They get their numbers from 4,700,000,000 Bytes. Which isn't truly 4.7GB in how bytes are supposed to be calculated.

4,700,000,000B/(1024B/KB)/(1024KB/MB)/(1024MB/GB) = 4.37GB

Sometimes you can sqeeze a bit more with overburn.

The maximum is actually 4488 MB, at least from my calculations. I've burned this size before and it worked.

Different types of media have different maximum capacities. DVD-ROM, DVD-RW, DVD-R, DVD+R, DVD+RW, DVD_RAM are all different. And the people who replied before me hinted at the confusion caused by the SI unit prefixes referring to bytes (kilobytes, megabytes, etc).

The literal definition of kilo is one thousand, not 1024. The SI units are based on the decimal number system (base 10), not binary or hexadecimal. One gigabyte = one billion bytes (1000*1000*1000). But one gibabyte = 1,073,741,824 bytes (1024*1024*1024).

Manufacturers of computer related items are legally allowed to rate capacities in SI units, rather than powers of 2. A gigabyte is not an integer power of 2. A gibabyte is 2^30. So, 1 gigabyte = 0.931322575 gibabytes. The
maximum-advertised-capacity-of-a-DVD * 0.931322575 = what-the-computer-says-is-the-maximum-capacity. So, a 4.7 GB DVD-+R will hold about 4.3 gibabytes of data.

From the man page.

-overburn
Normally single layer DVD media can accommodate up to approximately 4.700.000.000 bytes (in marketing speech 4.7GB). In other words a DVD can contain about 4.377 GiB or 4482 MiB. Same kind of arithmetics applies to Blu-ray Disc capacity of 25.000.000.000 bytes. Anyway, growisofs won't start without this option, if "overburn" condition appears to be unavoidable.


Sure seems to be funny math to me.

You can use 'cdrecord -media-info' to find out the capacity. On DVD-R I notice it is 4707319808 bytes, and google says 4 707 319 808 bytes = 4 489.25 megabytes. It is correct because 4707319808 bytes / 1024 = 4596992 KB / 1024 = 4489.25 MB. So, the maximum is actually 4489, but so it is easier to remember I remember 4488. It's always good not to cut is so close anyway.

Oh, and I have to mention that you can't actually burn say a file of 4488 MB to a DVD, mostly because once you add it to an ISO the filesystem will take up more space and it will be too large. Try something like 4480 or so, I just burned a few files of this size, so it will work.