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Re: DVD-R as backup medium: growisofs + udftools



Joerg Schilling wrote:
I'm trying to backup a couple of GBs upon a DVD-R using Plextor PX-810SA,

What drive is this? Is this a Lite-ON?

Plextor PX-810SA

To start I thought about using packet writing / udftools. By reading documentation, it states that I have to

Wny?

I wanted to mount the media as rw and give its mountpoint to flexbackup as 'standard' directory.

dvd+rw-format -force /dev/sr0

for RW media only, so I guess this is not applicable to -R, right?

Why do you ike to do this at all?

Just quoting the documentation :-) I'm a newbie in DVD recording world.

Then I have to:
<quote>
Write an empty session spanning the whole medium. It seems that
without this step, any attempt to create the UDF filesystem will fail.

DVD-RW: growisofs -Z /dev/sr0=/dev/zero
</quote>

With DVD-R as well as with DVD+R, this is expected to create a nice coaster.

Yep, just as I thought.

But this does not sound good to me. Wouldn't this just waste my media?

Of course, see above.

Why don't you just write using mkisofs and cdrecord?

Definitely next step but follow this:
<ideal world>
mount -o rw /dev/sr0 /mnt/x
flexbackup writes to /mnt/x directly using udf/packet

<real world>
flexbackup writes to a directory
mkisofs /directory |cdrecord

In real world I need to make room for temporary backup files, which I thought I could avoy

--
        Giuseppe "Cowo" Corbelli ~\/~ My software: http://cowo.yoda2000.net
-<! Non c'e' niente da dire in proposito. Tutto quello che uno deve fare e'
  colpire i tasti giusti al momento giusto, e lo strumento suona da solo. !>-
                                J.S. Bach



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