backup a write-protected CD in Linux

[Jeff Vian]

On Sun, 2004-09-26 at 09:16, Vinicius wrote:
> Em Sáb, 2004-09-25 às 23:21, Shawn Milo escreveu:
> > YigalB wrote:
> > 
> > > I have a game which my kids love very much, run on XP. The company 
> > > which made this CD is no longer alive, and the CD starts to be in bed 
> > > shape – so I must back it up – the sooner is better.
> > >
> > > Is there a SW to do it under Fedora core? I know some utils under XP 
> > > (clone CD, Nero etc).
> > >
> > > Oh yea – one more thing – the CD is protected – I guess it has some 
> > > “bad sectors” or similar.
> > >
> > > Thanks
> > >
> > > Yigal
> > >
> > 
> > I suggest trying dd. It is a simple command-line utility which will copy
> > a file byte by byte, and will not be fooled by "bad sector" problems.
> > 
> > Syntax: dd bs=32 if=/dev/hdb of=/home/yourname/file.iso
> > 
> > The "bs=32" tells it to read in 32 bytes and write out 32 bytes, 
> > regardless of
> > the junk in those bytes. This will even allow you to make copies of 
> > filesystems
> > your system does not understand.
> > 
> > Shawn
> > 
> 
> "$ dd bs=32 if=/dev/cdrom1 of=FS2004_4.iso
> dd: lendo `/dev/cdrom1': Erro de entrada/saída
> 48384+0 registros de entrada
> 48384+0 registros de saída"
> 
> "$ dd bs=32 if=/dev/hdd of=FS2004_4.iso
> dd: lendo `/dev/hdd': Erro de entrada/saída
> 48384+0 registros de entrada
> 48384+0 registros de saída"
> 
> So the both cases shows me a file FS2004_4.iso with 1548288 bytes.
> 
> "$ df
> /dev/hdd              630M  630M     0 100% /mnt/cdrom1"
> 
> Is it right?
> 
what does 'du FS2004_4.iso'  or 'ls -l FS2004_4.iso' give?

First look says not a complete copy, but...