Re: xorriso format seems not to respect size argument

[Thomas Schmitt]

Hi,

carsten.kunze@arcor.de wrote:
> $ xorriso -outdev /dev/sr0 -format by_size_23610m
> ...
> Media summary: 0 sessions, 0 data blocks, 0 data, 22.6g free
> ...
> $ dvd+rw-mediainfo /dev/sr0
> ...
>  Track Size:            11826176*2KB

That's indeed not what i expect from that run.

I started a run of
  -format by_size_23610m
with debugging verbosity on a BD-RE.

I see these messages when formatting begins

  libburn : DEBUG : Format type 30h "BD-RE", blocks = 12088320
  libburn : DEBUG : CDB: 04 11 00 00 00 00
  libburn : DEBUG : Format list: 00 82 00 08 00 B8 74 00 C2 00 00 00

which looks correct for the wish for 23610 MiB (0xB87400 = 12088320
blocks of 2048 bytes).

The outcome of this run is as expected:

  $ xorriso -outdev /dev/sr4 -list_formats -toc
  ...
  Format status: formatted, with 23610.0 MiB
  BD Spare Area: 0 blocks consumed, 131072 blocks available
  ...
  Media blocks : 0 readable , 12088320 writable , 12088320 overall
  Media summary: 0 sessions, 0 data blocks, 0 data, 23.1g free

So if you happen to repeat this, it would be interesting to see what
is reported with:

  xorriso -report_about debug -outdev /dev/sr0 -format by_size_23610m

Another interesting experiment would be formatting by

  dvd+rw-format -ssa=268435456 /dev/sr0

and checking the resulting medium state.

Regrettably each of these experiments needs a fresh BD-R.


Have a nice day :)

Thomas