[Pkg-opt-media-team] Bug#709971: dvd+rw-tools: growisofs more then 1 Bluray, since Debian 7 speed collapses

[Winfried Münch]

Hi,

I tested the actual stabel kernel 3.9.4 and see the same problem. only a
eject on a other drive brings the write speed down to 0.4x to 0.8x.

So next I will test with the 64k bs...

Winfried

Am Mi, 5.06.2013, 20:47, schrieb Thomas Schmitt:
> Hi,
>
>> a non-kernel workaround should not be the goal,
>
> Not a final goal, indeed.
> But maybe we learn more from writing chunks of 64 KiB.
>
>> So there must be changes between kernel
>> 2.6.32.5 and 3.2.0.4 for ioctl
>
> I assume it's in the levels below the ioctl(). There is queing
> of command requests, driver code for particular busses and
> controller boards, ... lots of room to look for bugs.
>
>> I will test a newer kernel asap.
>
> This will at least clarify whether it was a short living
> problem in the kernel.
>
>
> -------------------------------------------------------
>
>> growisofs sr0info [...] xorriso sr1info:
>
> Strange. The first mediainfo reports
>>  Mounted Media:         41h, BD-R SRM
> which would match the media state that is used by libburn underneath
> xorriso.
>
> The second one is
>>   Mounted Media:         41h, BD-R SRM+POW
> which would match growisofs.
>
>
> But this from the first one does not look like the libburn results
> on my own BD burners:
>>  Disc status:           complete
>>  Number of Sessions:    1
>>  State of Last Session: complete
>>  Number of Tracks:      1
>> READ TRACK INFORMATION[#1]:
>>  Track State:           complete incremental
>>  Track Start Address:   0*2KB
>>  Free Blocks:           0*2KB
>>  Track Size:            12219392*2KB
>>  Last Recorded Address: 5908367*2KB
>
> This is a closed medium (use xorriso -as cdrecord option -multi
> to keep it appendable if this is desired).
> But why does the drive report as track size the whole medium ?
> Well, the read size info looks ok:
>> READ CAPACITY:          5908368*2048=12100337664
>
>
> Probably the message by xorriso is a consequence of the Pseudo
> Overwrite formatting which growisofs applied.
> Hard to say whether this is sane or not.
> libburn does not do POW.
>
> The growisofs medium is appendable. But that does not mean it
> would have an incomplete session. (I will have to invest a BD-R
> for learning more about the doings of growisofs on these media.)
>
>
> Have a nice day :)
>
> Thomas
>
> --
> To unsubscribe, send mail to 709971-unsubscribe at bugs.debian.org.
>
>


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