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Re: BD-R burn errors



I did have =ssa:none on the growisofs argument. Changed it to =spare:none and then burned two BD-R at 21 GByte. Both finished normally and verified. The log reports did not include the background format message either.

Performance was also significantly increased. It started at 3.4x and then normalized around 2.8x. That is the best I have seen on anything related to BD media. The process used 30 minutes to burn 21~22 GBytes and then another 20 minutes to verify. The 3.4x was indicating almost 15000 KB/s.

I would be interested in knowing what can be achieved in performance. The drive is rated at 16x and the media is 6x.

Nice improvement.  Thanks for your excellent assistance.
James



On 04/17/2014 01:16 PM, Thomas Schmitt wrote:
Hi,

  Or I may have had =ssa:none.  From what I could tell in the source
file dvd+rw-format.cpp it should be equivalent.
"ssa" is not among the Luke Forces of growisofs.c.
There it would have to be
   -use-the-force-luke=spare:none
or
   -use-the-force-luke=spare=none

This is equivalent to dvd+rw-format options -ssa=none or -spare=none.
But the bug does not happen due to a dvd+rw-format run.
It happens when growisofs formats the BD-R before writing.


As you are already inspecting the source code: How about giving
the bug fix a chance:

--- growisofs_mmc_orig.cpp       2013-06-14 19:53:51.000000000 +0200
+++ growisofs_mmc.cpp   2013-06-14 19:55:25.000000000 +0200
@@ -756,6 +756,8 @@ static void bd_r_format (Scsi_Command &c

      wait_for_unit (cmd);

+    bdr_plus_pow = 1;
+
      cmd[0] = 0x35;     // FLUSH CACHE
      cmd[9] = 0;
      cmd.transport();

Several people confirmed that it silenced the error message at
the end of the burn run.


So I have been
considering just using BD-RE media since it appears to be working well.
They are indeed a very fine kind of medium. Just a bit slow for
their size. On the other hand, the drives keep a civilized noise
level when writing BD-RE. 6x BD-R sounds more like a sawmill.


Have a nice day :)

Thomas




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