From: Manuel C. <ll...@ja...> - 2001-08-16 23:02:46
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Andreas Mueller wrote: >>Is there a standard way to get/set the reading speed of a scsi cdrom? I >>would like to be able to do so. Also for writing, I know we have already >>discussed this, but I have a clean solution now :). >> > > For SCSI-2/mmc compatible drives we such a SCSI command that returns > the maximum read and write speed. But there's nothing in common for > the older drive models. > > What is the clean solution? Quote from a 3/5/00 mail: > For most but not for all recorder models. Also think of the situation > that a user selected multiple recorders with different maximum speeds. > I guess the maximal maximum speed would be appropriate in that case. Yes, really and argument to not do it [:)] . --- Basically, letting the user to select 20x when the burner is only 8x makes no sense. If we can't get the max recording speed then selecting the speed will work like now, but with a warning telling that we don't know what is the max speed for the burner (with the *don't show again* option, of course ;) ). Well, we now know the max speed, so let's say we have two burners, 4x and 8x. The user will have two options, use the max speed (max checkbutton) or use the max common speed if manually selected. Basically you can do this now, but you can also try to make both burn at 8x, which is wrong and will probably result in a coaster. If we know the max speed we can prevent the last. Selection of say 2x and 6x won't be available. I can't think of a situation. Anyway, you can't do this now :). Well, not a very clean solution :p, but will help users with "modern" recorders. Can we force the reading speed? Reading at a lower speed means less system load and better responsiveness. How do I get the max reading and writing speed? should we implement a method in DeviceList? Can cdrdao already set the reading speed? Can we specify multiple targets to cdrdao? or do we spawn different processes and the system cache does the work? I was also thinking of maintaining a feature list of cdroms/recorders, just like the current one but with more info, like firmware version (some recorders can write CDTEXT info after a firmware upgrade), ... but well, let's implement basic features first. Hope this is the last time I mess the duplicate cd dialog :D -- Manuel Clos ll...@ja... * Si no puedes hacerlo bien, hazlo bonito (Bill Gates) * If you can't do it well, do it nice (Bill Gates) |