[paranoia] cdparanoia: non-repeatable incorrectable sectors
weissel at ph-cip.uni-koeln.de
Sun Mar 12 05:41:50 PST 2000
Trying to kill the keyboard, Monty (xiphmont at xiph.org)
produced 2,8K in 70 lines:
> > to my dismay my CDrom decided that it would like to pop up some
> > 'V's every now and then, but not consistently.
> > Unluckily, I still got non-repeatable
> > errors, even when setting cdparanoia to realtime scheduling.
> Realtime scheduling shouldn't affect anything... that's the whole point of
> cdparanoia ;-)
Thought as much, since it's interrupt driven, right? So we'd
have to move to RT-Linux for realtime interrupts ... :-)
> ATAPI has no command for resetting/clearing out the
> drive and the way to wipe the drive clean is different for different drives.
> Some you need to power cycle, some you need to eject and re-insert, some you
> just need to spin down, etc....
In my case jumping back the odd 100 sectors forces it to do a
short search jump ... which does seem to be enough (and is
faster than spinning down).
> (It's generally not difficult to find somethignt hat works on one drive. The
> difficulty is not using the new sledgehammer to break all the other drives :-(
> CDROM drives are such a hack...)
A seek should not make things worse (I hope) ... _if_ we can
find our overlap again.
> > CDROM sensed: LITEON CD-ROM LTN382 WL2A
> Oh dear.
Ripping speed ... 1.5 X. Oh well. I can live with that,
> >  currently only "[skip]". Are any other condition (apart
> > from scratch) able to produce audible defects?
> Yes, '!'; it literally means that it's statistically likely that errors are
> getting through.
Haven't seen much of those, i've put them ([dropped] and
[duped]) into the "do a skip back and retry" list, but they
are very scarse on my CD-Rom. Out of 5 CDs ripped, I got 100
skips (50 of them on one CD) and one single dupe. In every
single case the seek had it re-reading the same place without
And in the bar I do get almost always "-" (" " are really rare),
sometimes quite a few "V", and the occasional "+".
--- >8 ----
List archives: http://www.xiph.org/archives/
Paranoia homepage: http://www.xiph.org/paranoia/
To unsubscribe from this list, send a message to 'paranoia-request at xiph.org'
containing only the word 'unsubscribe' in the body. No subject is needed.
Unsubscribe messages sent to the list will be ignored/filtered.
More information about the Paranoia