fresh install ---blooming DVD drive not recognized AGAIN
blchupin at iinet.net.au
Mon Jan 16 05:03:55 UTC 2012
On 16/01/12 15:35, Basil Chupin wrote:
> On 16/01/12 15:09, Basil Chupin wrote:
>> On 16/01/12 14:41, Ric Moore wrote:
>>> On 01/15/2012 08:17 PM, Basil Chupin wrote:
>>>> Yesterday, after several frustrating hours where I could not get my
>>>> wife's computer to work properly (I had to move the system into a new
>>>> box - don't ask :-) ), I realised that one should prepare a check list
>>>> of what to do when tackling a damn computer's innards and tick them
>>>> as the work progresses :-( .
>>> I always mean to do that, but I get into "Master of the Universe"
>>> mode, with the skin of my scalp pulsing and bulging from all the
>>> brains packed under there, and think I'll remember it all. <sighs> I
>>> know, someone just shoot me.
>>>> I couldn't get the darn thing to work properly because......I had
>>>> forgotten to check that the jumpers on the HDs and the CDROM and DVD
>>>> burner were correctly set :-( .
>>>> So, are your jumpers all set correctly?
>>> But of course. <smirks> I have one harddrive and one CD/DVD r/w.
>>> Both are set to "master", as each is on it's own cable and both are
>> OK, both on separate cables and both set to Master. Positive?
>>>> means that rather than use the 80-wire cable you regressed to the old
>>>> 40-wire cable - which is why you are getting the message that your
>>>> is now only 33 "due to 40-wire cable". S
>>> Secondly, you state above that you use a "newer fat one" IDE cable.
>>> Nah, I should have been clearer... I used a NEWER "fatter" IDE
>>> ribbon cable to the DVD drive. It's still the old IDE flat ribbon
>>> style though. It LOOKS nicer, and a little more heavy duty, so it
>>> ought to work better? Heh, the optimistic side of me shows.
>> So this newer cable IS 80-wire cable, right?
>> In which case the kernel is not recognising the full UDMA of the
>> drive because it is giving you the message that the UDMA is
>> restricted to 33 because of the "40-wire cable". To get the full UDMA
>> for your drive you then need to apply the fiddle I gave in my
>> previous response.
> I shouldn't have skimmed over your reply and should have written above
> that the fix you ought to be using is 'libata.force=2:80c' because
> your DVD R/W is on the second channel. But if both the HD and the DVD
> are showing the wrong UDMA then use 'libata=1:80c,2:80c' (which is
> what I have to use because I have HD and DVD R/W on channel #1 and HD
> and DVD R/W on channel #2 and without the fix dmesg shows that all are
> configured to UDMA33 because of the "40-wire cable" trick.)
Awwwww, HECK! :-( . I'll get this right any minute now.....
I just looked at my notes re this libata thingie, and there are 2 things
I need to add:
1. my notes state to use 'force=x:80c' [no 'libata' before the 'force']
"if not statically in the kernel" - whatever "if not statically in the
kernel" means - where "x" is the channel number; and
2. probably much more important, is to run 'sudo grub-update' after
inserting the 'libata.force...' statement in the menu.lst .
I think I've got it all now :-) .
PS Let me know if you detect puffs of smoke wafting from the computer case.
It is easy to convince people of something, but hard to keep them convinced.
More information about the ubuntu-users