Bill Davidsen wrote:
Hugo van der Merwe wrote:
I would highly suggest trying to read the DVD's under another OS. There is
a Linux kernel bug regarding reading CD/DVD media related to the
read-ahead cache.
Thanks, not the case though. I know people had problems in WindowsXP
with the DVDs I wrote, as well as checking the files myself - I run into
bad files as soon as 1/3 into the DVD. (Assuming files were added in
sorted order.) dd can fail quite soon as well.
BTW, I've noticed dd dumps being smaller than the original .iso - but
still all the files are fine (mount and diff -r gives "perfect
verification"). This being on CDs. I've not yet successfully verified
any DVD. 7 out of 7 checked were bad, and I handed out another 8 which I
therefore assume are possibly all bad.
I think I will try Verbatim's DVD-R (might that help?), then possibly
another brand, then I'll be looking for another DVD writer. (I have a
"BTC" writer - cheap cheap. Suppose I might paying for my stinginess
now.)
Maybe... I have a Pioneer DVR-104 in this system, and a Lit-On LDW-451S
in the one next to it, both of which have produced about a hundred
backup data disks using cheap DVD-R media of various kinds, as well as
a few hundred data CDs and maybe 8-10 audio CD.
Other than the fact that I can't find the right media and incantation
to burn a DVD which plays in a non-computer, I have no complaints.
Someday someone will write a decent documentation on the DVD process
instead of on one programs to do one thing which may not be what you
want. Since that's not why I got the hardware it's an annoyance not to
be able to take DVD presentations with me, but if it ever becomes a
requirement before such documentation is written, I'll get a Mac.
I doubt that this is a problem with cheap hardware, but if the firmware
is up to date it might be.
I also doubt it. Cheap hardware would likely cause perhaps a higher
risk of burning a coaster, with the exception Bill noted about firmware.
I've also had expensive drives fail until the firmware is upgraded.
In general, I've had better results with the "cheap" lite-on than with
several more expensive drives.
--
bill davidsen <davidsen@tmr.com>
CTO TMR Associates, Inc
Doing interesting things with small computers since 1979
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