[SATLUG] simultaneously burning multiple DVDs

Samuel Smith satlug at net153.net
Sun Dec 28 14:49:12 CST 2014

On 12/26/2014 12:14 PM, Borries Demeler wrote:
> Recently a question has come up for which I do not have a good answer -
> does anyone have a good explanation for this:
> If one has multiple DVD writers installed and wants to make multiple
> copies of the same iso file by simultaneously writing them to all
> installed DVD writers, such an operation produces faulty drives.
> Furthermore, K3B does not allow writing to multiple drives - there must
> be a reason for that.
> I am trying to figure out where the bottleneck is. Initially, I suspected
> that the harddrive my not be fast enough to be read by multiple cdrecord
> instances. But copying the iso file to a ramdrive and burning with the
> ramdrive location as the source offered little to no improvement. The
> SATA drives (configured as a RAID) should not be a bottleneck. I measured
> the sustained read speed to be no less than 150 MB/sec.
> Is there is a solution so one can write to multiple writable DVD drives,
> and where is the bottleneck? Does anyone have experience with this
> particular problem?
> Thanks, and happy holidays to all! -borries

K3B is basically just a wrapper around several command line tools that 
burn disks. You could I suppose, just run those commands as many times 
as needed in parallel. Never tried it though.


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