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Old 12-27-2006, 06:08 PM   #1
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Question Blanking DVD+RW: Mepis 3.43 vs Mepis 6.0 - What changed?


I recently upgraded from Mepis 3.43 to Mepis 6.0.

In Mepis 3.43 I could enter konsole and enter the following command to blank (not format) a DVD+RW:

growisofs -Z /dev/scdN=/dev/zero

Side Note: Where scdN = your device mount point

However, this command doesn't work in Mepis 6.0. The DVD+RW does not blank: It remains full. Here is the output of a recent Mepis 6.0 attempt to blank a DVD+RW (the beginning text is different than it was under Mepis 3.43):

WARNING: /dev/hdd already carries isofs!
About to execute 'builtin_dd if=/dev/zero of=/dev/hdd obs=32k seek=0'
/dev/hdd: "Current Write Speed" is 2.5x1385KBps.
3375104/4700372992 ( 0.1%) @0.4x, remaining 139:09
15237120/4700372992 ( 0.3%) @2.5x, remaining 51:14
26378240/4700372992 ( 0.6%) @2.4x, remaining 38:23

4676943872/4700372992 (99.5%) @2.5x, remaining 0:06
4688150528/4700372992 (99.7%) @2.4x, remaining 0:03
4699291648/4700372992 (100.0%) @2.4x, remaining 0:00
:-[ WRITE@LBA=230540h failed with SK=5h/ASC=21h/ACQ=02h]: Invalid argument
builtin_dd: 2295104*2KB out @ average 2.4x1385KBps
Sad write failed: Invalid argument
/dev/hdd: flushing cache
/dev/hdd: stopping de-icing
/dev/hdd: writing lead-out

Obviously I skipped some of the needless, tedious output and just showed the beginning and end.

Does anyone know why that command no longer works and just as importantly: What must I do to make Mepis 6.0 blank a DVD+RW?

I look forward to your replies.

Old 12-28-2006, 03:04 PM   #2
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I'm guessing you have a new/different ver. of growisofs.

On my MEPIS 3.3.2:
$ growisofs --version
* growisofs by <>, version 5.21,
  front-ending to mkisofs: mkisofs 2.01-unofficial-iconv (i686-pc-linux-gnu)
What does MEPIS 6 show?

If you didn't overwrite it, what does your old 3.43 show?

Note that the output includes the ver. of mkisofs.

Have you re-read the "FM" to see what might have changed?
Old 12-28-2006, 04:51 PM   #3
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Mepis 6 gives the same output as yours for growisofs --version

What she is doing here is bit copying zeros on to a DVD which ends up then I assume covered in zeros
Don't know why -You would be spending a lot of time waiting as it wrote data (zeros) all over the disk . If you are just putting new stuff on it a format is enough and quick

K3B formats a DVD and it would then be ready to write data all over it (After format the addressing data at the front of the disk points to nothing , but the old data is still on the disc but unaccessible and is later written over when you put new data on it )
So the command "growisofs -Z /dev/scdN=/dev/zero" issues the below command which gives a warning as so
"WARNING: /dev/hdd already carries isofs!
About to execute 'builtin_dd if=/dev/zero of=/dev/hdd obs=32k seek=0'"

the command built into growisofs is "dd if=/dev/zero of=/dev/hdd obs=32k seek=0"
You can look up the manual entries for this with
man dd
man growisofs

Note the output file above is going to "of=/dev/hdd"
Which is not where you want it to go or at least it is not /scdN is it?
I get a feeling /dev/scdN is a link pointing to /dev/hdd -maybe your problem is in there

I see you posted just after me and it fixed itself .

Last edited by tytower; 12-28-2006 at 07:26 PM.
Old 12-28-2006, 04:55 PM   #4
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Issue Resolved - Somehow. . . .

This issue was resolved - somehow.

The 1st time (right after fresh install) I tried it, it did not work, but it worked afterwards.

Go figure.


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