Hi,

Thomas Amm wrote:
> First you might remove the pktcdvd module:
>  Not sure if it causes this specific problem but it is for pre-
> growisofs CD-RW writing.

The packet writing device bundles smaller write requests in larger chunks
and ensures to write only at addresses and with sizes which are aligned
to the medium's Fixed Packet Size. With CD this size can be chosen.
With DVD it is 16 = 32 KiB. With BD it is 32 = 64 KiB.


> Nobody uses that anymore

Packet writing is life prolonging with random access writing to formatted
CD-RW and maybe to DVD-RAM, DVD+RW, and BD-RE.
It is needed for random access writing to formatted DVD-RW, which only
accept write operations with 32 KiB granularity.

Burn programs do not need /dev/pktcdvd, because they usually write
sequentially with a suitable alignment.
(.. and sequential writing is the most life prolonging way of writing.)


> and it interferes with "straight" CD/DVD-burning.

Not necessarily. The /dev/pktcdvd device uses the /dev/sr device when it
performs its operations. But as long as it is not used, the /dev/sr
device will not be disturbed. And even if so, then the media types which
are suitable for /dev/pktcdvd can stand WRITE commands from two
uncoordinated processes.


Have a nice day :)

Thomas

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