Re: Which DVD Media Do I Need?


"Jim Howes" <jimhowes@xxxxxxxxxxxxxxxxxxxxx> wrote in message
news:477969a7$0$515$5a6aecb4@xxxxxxxxxxxxxxxxxxxx
However, here's my tuppence worth..
now that's what I call value for money!

Obviously -R and +R discs are write-once. Given the cheapness of the
two, this may not be a problem, given that bulk discs will set you back
of the order of 15p/disc.
Point taken; hardly seems worth buying the much more expensive RW discs

There are a lot of differences between how -R and +R discs are actually
written, but I'll let you gather that information yourself as it is just
plain confusing.
Yes, went to Wikepedia and got:
" In 2002 a new format was developed called DVD+R (or "plus" R). Created by
a coalition called the DVD+RW Alliance, this format uses a number of
improved technologies that, while generally unnoticeable to the end user,
make a more reliable technology. One example is the ADIP system of tracking
and speed control used by DVD+R being less susceptible to interference and
error than the LPP system used by DVD-R, which makes the ADIP system more
accurate at higher speeds. In addition, DVD+R(W) has a more robust error
management system than DVD-R(W), allowing for more accurate burning to media
independent of the quality of the media. Additional session linking methods
are more accurate with DVD+R(W) versus DVD-R(W), resulting in fewer damaged
or unusable discs due to buffer under-run and multi-session disks with fewer
PI/PO errors.[1]"

Your choice of whether to use + or - is far more likely to be influenced
by external factors. I have a Pioneer HD/DVD video recorder, and that
only eats DVD-R and DVD-RW, so that's my main reason for buying bulk
DVD-R media (with a ritek G.05 dye from svp.co.uk for what it's worth).
A friend has a camcorder that only eats DVD+R.

Don't have any appliances which use DVD so not a problem. Only wife's PC and
my laptop; but I guess they will read almost anything.


DVD-RAM is another kettle of fish. It does not require formatting as
per DVD+RW, nor does it need de-icing as per DVD-RW. One thing it DOES
have which makes it far superior for data interchange than the others is
integrated bad-block management. (Ok, so DVD+RW has this in the spec,
but it is rarely actually implemented) The big downside is speed; 3X
is about the maximum, although faster DVD-RAM is in development. DVD-RW
can be formatted with any filesystem you happen to like to use (such as
FAT32, linux ext2) or just written in UDF/ISO as a DVD+/-R(W). In
theory DVD+RW (and a fully-erased DVD-RW) can also hold arbitary
filesystems, but the lack of bad-block management causes those
filesystems to fall apart rather quickly.
The Lite-on drive I have ordered supports SMART-BURN, SMART-X, ABS®
mechanism. I think this may go someway towards bad block detection?


If I was going to use -RW or +RW, I'd probably go for +RW for pretty
much the same reason as detailed here
http://www.cdfreaks.com/reviews/Why-DVDRW-is-superior-to-DVD-RW

thanks for that link, very interesting

Regards,
Jim

and thanks for taking the time for such a full reply. So I ordered +R

Davy


.

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