Re: cd copy/read errors

[Paul E Condon <pecondon@mesanetworks.net>]

On Fri, Jun 30, 2006 at 01:29:02PM -0500, dan_elliott@cox.net wrote:
> Hello,
> 
> I am thoroughly confused.  I have been attempting to burn an exact copy of a disc containing proprietary software for backup purposes (disc is expensive).  I have found many similar posts on many mailing lists but none solve my issue.  This is what I have tried thus far:
> 
> $ cat /dev/cdrom > blah.iso
> <see error example below>
> 
> $ isoinfo -d -i /dev/hdc
> CD-ROM is in ISO 9660 format
> System id: Solaris
> Volume id: MATLAB_SV14
> Volume set id:
> Publisher id: The MathWorks,Inc
> Data preparer id:
> Application id: MATLAB
> Copyright File id:
> Abstract File id:
> Bibliographic File id:
> Volume set size is: 1
> Volume set sequence number is: 1
> Logical block size is: 2048
> Volume size is: 335261
> Joliet with UCS level 3 found
> Rock Ridge signatures version 1 found
> 
> dd if=/dev/cdrom bs=2048 count=335261 > blah2.iso

Try 
  dd if=/dev/cdrom of=blah2.iso



> 
> All of the above commands result in many errors resembling following error:
> 
> ide: failed opcode was: unknown
> end_request: I/O error, dev hdb, sector 4676
> printk: 1 messages suppressed.
> Buffer I/O error on device hdb, logical block 1169
> hdb: media error (bad sector): status=0x51 { DriveReady SeekComplete Error }
> hdb: media error (bad sector): error=0x34 { AbortedCommand LastFailedSense=0x03 }
> 
> I can mount and run programs off of this disk, so I know it is readable.  Is there some copy protection feature?
> 
> Thank you.
> 
> -- dan elliott
> 
> 
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-- 
Paul E Condon           
pecondon@mesanetworks.net