Hi,
Harondel J. Sibble wrote:
On 14 Jul 2005 at 23:59, Arno Lehmann wrote:
Seriously the best solution. I also avoids the !§&(%&*§-ing
unreliability of DVD-/+R(W)... you are German, right? See one of the
last c'ts... my personal experience with DVD+RWs is, although limited,
not really positive. I'd suggest to use DVD as a backup media only if
you really can't afford anything better... even HD backup is preferrable in my
opinion.
Don't read German so dunno about your article, however I've had zero problems
using dvd+r and +rw for backups under both Windows and Linux. I have 8 or 9
clients using it this way on a daily basis. What kind of problems were you
refering too. Note, this is not specifically using bacula. On linux,
typically use custom scripts with the dvd+rw tools.
The problem is not in writing to DVD or using some scripts or whatever
programs you need, and thus not specific to bacula, linux, or any
software... What I referred to is the fact that it's not easy to find a
combination of DVD-writer, DVD-disks and writer's firmware, together
with writing speed settings, that produce DVDs that are error-free and
that can be read on any DVD drive even after some time.
Short summary from the article I mentioned (they tested 6 current
DVD-drives and more than 60 DVD+-R(W) disk types:
DVD-writers from NEC and Pioneer work most reliable: "... _seldomly_
struggle with burning errors and need _hardly_ be afraid of the writers
writing the disks too fast..." (emphasis by me, c't 14/2005, p. 109)
"Plextors PX-716A achives excellent results with the right disks, though
the DVDs should be checked often with the Plextools - safe is safe." (ibid)
"Owners of the Philips-writers have to drastically step on the brake,
they should follow the write speed recommendations from the disk tables
[as published in this magazine, A.L.] exactly an manually throttle the
writer." (ibid)
"For these Models [Liteon and LG] you have to choose the media with
great care to avoid unwanted data loss." (ibid)
This is not what I would consider for a backup. The published results
conform with my experience that you can have good results, provided you
have the right combination of the above mentioned factors - and you
don't expect your data to be accessible after some storage time,
probably under suboptimal conditions (temperature, sunlight).
Some notes on the quotes:
The c't-magazine is, in my opinion, a very good publication. It has it's
place in the German-speaking IT society, and there are reasons:
Not only don't they limit themseves to purely technical articles, but
they also discuss legal and social consequences of tecnology. They have
a good mix of product reviews, larger presentations, comparisons, own
projects both in hard- and software, and tests.
The tests are extraordinary, especially compared to most other
publications I know: they always explain what they test, and why and how
they do so. They give detailed test results (in the case of he DVD
media, that's 8 pages of tables with detailed information plus text),
and they never give awards or simplified rankings.
As far as I know (and I do know people working for the publisher) they
try to get the products they test through regular channels or
anonymously to avoid the manufacturer giving them hand-crafted test
samples or to take influence through advertisement etc. Quite often that
seems to work.
So, usually (when I understand their results :-) I tend to believe their
publications.
Arno
--
IT-Service Lehmann [EMAIL PROTECTED]
Arno Lehmann http://www.its-lehmann.de
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