[mythtv-users] Writing a dual layer DVD+R DL disk

jason maxwell decepticon at gmail.com
Sun Mar 4 16:36:40 UTC 2007

its possible that data flow cant keep up with the speed of the writer.
you can pass cdrecord options thru growisofs. i would recommend
limiting the write speed with speed=4 or something. also use the dummy
flag until you succeed to avoid making more coasters, then you can
bump up the speed a little and try again. some drives have a burnfree
option, which can be enabled via the command line as well. read the
man pages for growisofs, mkisofs, and cdrecord.

also check to make sure you have DMA enabled on all of your drives.
use hdparm /dev/<device> to check, if it's set to 0, turn it on with
hdparm -d1 /dev/<device>.  although most systems automatically enable
it these days by default.

On 3/4/07, Mark Smith <mark at chez-moi.org.uk> wrote:
> In message <D60A57CB-F6B3-471A-B7F4-F555C8409A13 at beww.org>
>           Brian Wood <beww at beww.org> wrote:
> > > You might try a different brand. A different burner might help, too.
> >
> > You might clean the laser lens. When they get dirty they start to
> > fail on the DL disks before they crap out on the single-layer ones.
> I also have a newer (1 year as opposed to 2 year old) NEC drive in my main
> Linux server. This one's an ND-4550A.
> Writing to the same batch of DL disks also fails on this, but only gets about
> 10% of the way through.
> Has anyone had success writing DL disks with an NEC drive? Are they
> particularly prone to problems with dirty mechanisms? I have a Liteon writer
> in another box - I'll try that as well and see if I have success. If not, the
> media must be suspect, but interesting that it consistently fails at two
> different points on two different NEC drives.
> --
> Mark Smith - Surrey, UK
> http://www.chez-moi.org.uk/
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