Ismail Donmez wrote:
>> mode_sense page 2A vs get_performance
Wonder if Joerg and/or Andy will comment on this? Like using get_performance
instead of mode_sense would work all devices? Does it have any drawbacks?
Maybe a link to RTFM? :)
Plextor PX-712, Fw 1.06
-> reports broken lists on *both* of those commands when 4x DVD-RW media
is mounted (both lists say "4x, 2x, 1x", but set_streaming with 1x speed
fails)
-> when CD media is mounted, the maximum speed returned using get_performance
(write_descriptors) is the speed recommended by PowerREC, even when it is
disabled
Plextor PX-716, Fw 1.04
-> when higher speed DVD+R media is mounted, mode_sense erroneously reports
2.4x along with the other (correct) speeds reported by get_performance
LG 4120B/4163B
-> The applied write speed cannot be verified using mode_sense page 2A,
unless it is 4x or the maximum speed the media is supported at
The only way would be to
- retrieve both lists
- check if one is nonsense (like listing CD write speeds when DVD media
is mounted, that's what NEC is doing)
- discard the nonsense list, if there is any
- try to set all speeds which are left and check if the speed was
accepted by the drive, unless the drive is unable to report the current
speed setting (like LG). Don't ask me how to do that automatically,
I don't know (yet).
Alexander
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