Re: [gentoo-user] dd if=/dev/dvd of=backup.iso

Joseph writes:

> Is there any limitation in using "dd" to generate backup of DVD (dvd is
> 4.7, unencrypted)?

There should be no limit.

> If I use:
> dd if=/dev/dvd of=backup.iso
> I only get about 2Gb file and it stops or freezes, the disk is bout
> 4.3Gb

Are there any syslog or dmesg messages?

Some ideas:

Try readcd instead of dd, it's in app-cdr/cdrtools.
readcd dev=/dev/dvd -f backup.iso

Or use dvdisaster (free, get it from http://www.dvdisaster.com/). It  
is especially useful for bad disks, and doesn't stop when encountering  
an error. If the image has errors after reading the whole disk, you  
can read the image again, with another drive if possible, and it will  
fill the missing parts. It is a graphical application (with a nice  
rendering of the reading process), but also works on the command line.

        Alex
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