Re: dvd+rw-tools: growisofs exit code
> I have been using PRINCO media for 3 years with extremely good results. So
I had a spindle of 25 Princo CD-R once. Out of that box, at least a
third of disks produced a "no media" result when inserted in 3(!)
different(!) burners. Those which burnt caused trouble with reading in
drives. I've heard negative comments from others too. It cost me some
time to find out what the story was because I was silly enough not to
believe that some idiot could make something that crappy. The
occasional dud I can tolerate, 1/3 sh*t straight out of the box is all
I need to know. That was and will be my only contact with Princo.
> inspired any confidence that these were from people with any understanding
> of the technologies. They just abused the manufacturer rather than provided
> any reasoned explanation.
The above is enough reason for me as far as I am concerned. ;)
> However good is a manufacturer, there is still a chance of the occasional
> defective disc. I want my script to notice and not blindly miss a 4.3 Gbyte
> chunk out of a series of DVDs in a backup set.
Very true. However, a verify of the burnt data is the only way to
achieve this. Same as with floppy backups many years back. Technically,
you'd have to run some sort of C2 error analysis on the burnt disk, but
I use md5 sums.
That's not to say that growisofs shouldn't exit !=0 if it couldn't
complete successfully.
Simply burning the same disk again after you had an error on it is
dodgy if you're concerned about backup data security, as the reason for
the error in the first place can only have been that the burning at
that spot was marginal. Think of it as the deviation from the correct
position/value/whatever at that spot, of the media plus burner plus
other factors, exceeded the error limit of the process. This is always
cause for concern esp if it happens repeatedly.
Volker
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Volker Kuhlmann is possibly list0570 with the domain in header
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