lkml.org 
[lkml]   [2003]   [Mar]   [4]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectIDE DVD reading & error handling
Hello,

Is there a way to optimize the IDE layer to handle DVD
read errors more gracefully ?

Most used DVDs (borrowed from a local library, etc.) seem to have some
defects. Those cause the IDE layer to get stuck for quite a while,
interrupting the movie playback. It might be better to just return an
error for that sector and let the player software continue.

I wonder if it would be possible to tune the IDE layer by i.e.
reducing the number of retries and disabling the controller reset, etc.

I haven't fiddle with the below numbers, yet. Just wondering if that
could improve the situation, or if there are any other tricks that one
could play here ?

/*
* Probably not wise to fiddle with these
*/
#define ERROR_MAX 8 /* Max read/write errors per sector */
#define ERROR_RESET 3 /* Reset controller every 4th retry */
#define ERROR_RECAL 1 /* Recalibrate every 2nd retry */

Cheers,

Mathias

PS: Also which DVD ROM do people recommended in general ?
Which one seems to have a decent error correction scheme
not just a high read speed?

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 13:33    [W:0.031 / U:2.320 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site