dd command to copy a cd to a hard disk - Input/output error

[Tomasz Ciolek]

 That is quite correct. 

 Alspo dd soes not ge direct access to the cd so any subchannel data
 will be lost... user cdparanoia for audio... Threy are also working on
 the raw data copy utility...

 regards
 TMC

On Sat, Mar 30, 2002 at 01:36:47PM +1100, Simon Burton wrote:
> Daniel,
> i just tried it,
> the dd trick seems to only work with data CDs,
> not audio CDs (which the CD would treat differently i presume).
> 
> also i think the for loop needs some semi-colons,
> try a loop on your cmd line, e.g.
> $ for i in .; do ls $i; done;
> 
> oh wow, it works!
> just put a ; after the list of nums.
> 
> let me know what else you find,
> 
> simon burton
> 
> 
> Daniel wrote:
> 
> >Hello All,
> >I wonder if anyone can help me please:
> >I have tried to copy a cd to hdd on Mandrake 8.1 and Redhat 7.2 (I've 
> >done it before, but this time it's not working):
> >
> >dd if=/dev/cdrom of=Mandrake82-cd1-inst.i586.iso
> >dd: reading '/dev/cdrom': Input/output error
> >1332304+0 records in
> >1332304+0 records out
> >
> >The original cd works, so perhaps the problem lies with the block size 
> >which I should specify in the format:
> >dd if=/dev/cdrom ibs= ???k of=Mandrake82-cd1-inst.i586.iso obs=???k
> >
> >Am I on the right track?  Is there an easier or more logical way of 
> >figuring out the correct input or output block sizes?
> >Do both need to be specified?
> >At: http://www.linuxdoc.org/HOWTO/CD-Writing-HOWTO-4.html
> >I found what follows.  I have created the file and made it executable 
> >and as bash isn't in the path done 'sh file.sh' and I get an error on 
> >'do'.  Perhaps there's an alternative?
> >+++++++++++++++
> >#! /bin/bash
> >
> >RD=/dev/cdrom
> >for i in 32768,7   32776,32 32808,32 32958,128 33086,128 33214,128 
> >33342,128 33470,32 33581,16 33598,16  33615,16  33632,16
> >do
> >    old_IFS="$IFS"
> >    IFS=","
> >    set -- $i
> >    IFS="$old_IFS"
> >    OFFSET=$1
> >    LENGTH=$2
> >    echo "*`dd if=$RD bs=1 skip=$OFFSET count=$LENGTH   2> /dev/null`#"
> >done
> >++++++++++++++++
> >Any help would be greatly appreciated.
> >Thanks,
> >Daniel.
> >
> >_________________________________________________________
> >Do You Yahoo!?
> >Get your free @yahoo.com address at http://mail.yahoo.com
> >
> >
> >
> 

-- 
Tomasz M. Ciolek	*
			* 	Everything falls under the law of change;	
<tmc at dreamcraft.com.au>	*	  Like a dream, a phantom, a bubble, a shadow,
<tmc at goldweb.com.au>	*	  like dew of flash of lightning.
			*	  You should contemplate like this. 
*******************************************************************************
GPG Key ID: 0x7A18E49D	*	Available on www.pgp.net
*******************************************************************************