[Bug 1757030] Re: Lite-On DS8A1H Slimline fails to record dual layer DVD+R

[Thomas Schmitt]

Hi,

this time the layer break position was not set by growisofs.
Now i wonder what is the difference between the commands sent by growisofs
and libburn underneath xorriso.

Looking at the source code of growisofs it seems that no command RESERVE
TRACK is sent for DVD+R DL. libburn sends it if it decided for DAO/SAO-like
writing for which it announces the amount of data in advance.

You could risk a medium and run xorrecord with explicit option -tao
in order to see whether it fails too:

  xorrecord dev=/dev/sr0 -v -tao -pad 2017.iso

(If no -tao or -dao is given, i expect libburn to decide for -dao.)


> :-[ WRITE at LBA=0h failed with SK=5h/ASC=21h/ACQ=04h]: Invalid argument

It is not normal that a blank medium cannot take a first WRITE command
to block 0 and carrying 16 blocks. The error code stems from the drive.
But i cannot imagine what growisofs could have done wrong to get this
reply to its command.


> [5509731.308149] ata1.00: status: { DRDY }
> [5509736.352258] ata1: link is slow to respond, please be patient (ready=0)
> [5509741.332040] ata1: device not ready (errno=-16), forcing hardreset

Some quite short timeout period is to see here. After only 5 seconds the
first complaint appears. 5 seconds later, the device gets reset.

It is not clear to me whether the error was perceived by growisofs before
or after that reset.


If no deterministic explanation can be found, then you have to expect that
xorrecord could fail too with that drive at some random occasion.


Have a nice day :)

Thomas

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https://bugs.launchpad.net/bugs/1757030

Title:
  Lite-On DS8A1H Slimline fails to record dual layer DVD+R

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