I recognize all of these effects but I must say that it is not the Packet Writing technology that causes the troubles. InCD as well as DirectCD are UDF (Universal Disc Format) writer applications (and yes they are mutually exclusive so donâ€™t install the both of them) and their UDF interpretations cause all the trouble.
If you would know the UDF specification you could imagine that it is almost impossible to produce good software for it because of its muddle-headed nature. It contains methods for almost everything but no explanation about the processes whatsoever. It is therefore left to the imagination and interpretation of the (Roxio, Ahead) software developers how they will implement a UDF writer app.
FYI: a CD formatted with InCD is not writable under DirectCD and vice versa. Hence compatibility between the disc format is the big problem here, not the incompatibility of the discs.
The InCD UDF-application does not contain the VAT (Virtual Allocation Table) which makes a CD-R behave like a CD-RW because they are not the inventor of this method and hence must pay licenses which they donâ€™t. Therefore you canâ€™t e.g. rename a file on a CD-R or update a file under InCD. DirectCD obviously does pay the licensees (or just steals the idea) and therefore it has many more possibilities on CD-râ€™s.
After ample experiments I must conclude that DirectCD is the better built application but that doesnâ€™t mean it is free of bugs, annoyances and peculiarities. Sometimes it refuses to write to a recordable CD caused by the UDF detection which has somehow failed, and will treat the disc as a read-only disc (for safety).
Sometimes I get the message that the data on the CD is no longer valid and that I should backup the data. Ejecting the disc and reloading it again may cease the problems (for a while).
I have never had these problems when recording a CD as an ISO-9660 CD with neither software packages; other problems occur like buffer-under runs. Of course when you pull the power plug while writing your CD will be lost but this has nothing to do with good or bad writer software.
About the Mount Rainier drives; these will also use Packet Writing and will also utilize the UDF disc format but these drives will take care of defect management themselves. Theyâ€™ll claim additional disc space to place the defects so the net free disc size will be even smaller with CD-MRW. Currently the DirectCD and InCD application (the drivers thus) perform the defect management. Therefore I doubt whether these problems will be over caused by CD-MWR drives.