[Leaplist] CentOS question ....

[William A. Mahaffey III]

William A. Mahaffey III wrote:

> William A. Mahaffey III wrote:
>
>> Damien McKenna wrote:
>>
>>> On Jan 19, 2007, at 12:14 AM, David Simmons wrote:
>>>
>>>> It's weird that your optical drives doesn't show up in  
>>>> dmesg....maybe double
>>>> check connections....replace IDE cables....re-quadruple check the
>>>> jumpers
>>>
>>>
>>>
>>>
>>> Almost every time I've heard of a problem with a newly installed HD  
>>> or optical drive not working it has been because of the cable 
>>> and/or  jumpers set incorrectly.  Remember, if you have to drives on 
>>> a cable  the drive at the end of the cable should be jumperred for 
>>> Master  while the one in the middle should be Slave (I don't do the 
>>> cable- select thing myself).  Also, it is best to do one drive per 
>>> cable,  but still remember that it must be jumperred correctly or it 
>>> probably  still won't work.
>>>
>>
>> I have heard that as well (master last on chain). That is indeed the 
>> case here, POST shows LG GSA drive as secondary master & it is indeed 
>> the end of chain. I have been thinking a bit (always a dicey 
>> proposition) & I have a theory. I installed CentOS 4.4. CentOS is 
>> always based on an older (more stable, more thoroughly tested, more 
>> mature) code-base. This particular DVD burner is a relatively new (to 
>> the market, i.e. newly available) piece of hardware. I bet the 
>> installer had some newer driver in it that could cope w/ the *quite* 
>> newly available DVD burner, but the installed code has an older 
>> driver that can't handle it. Thoughts ?
>>
>
> Just to close this off, it looks like this burner (LG GSA H22N) is 
> indeed *not* supported under CentOS 4.4. A bit of more detailed 
> googling (pointed to by someone on the CentOS list) indicates that 
> this burner is supported for kernels 2.6.14 & up. CentOS uses kernel 
> 2.6.9, so apparently nogo ....
>

Well .... let's re-open & re-close this thing correctly :-). I ordered & 
just installed an extra PCI IDE controller on this box. I attached the 
DVD burner to the new controller, rejumpered the HDD on the original 
channel 2 (onboard) controller to master, reconnected & rebooted and 
.... voila: The DVD *is* recognized as /dev/hdg. Shows up in syslog 
file, I mounted & searched the CentOS DVD, AOK !!!!

Soooooooo .... definitely *don't* hook different (UDMA) types of devices 
on the same IDE controller. The LG GSA H22N is indeed supported under 
CentOS 4.4, kernel 2.6.9. It's a bit weird (to me) that SuSE 'worked' 
(quotes intentional) w/ this setup, although not overly reliably in 
retrospect. Live & learn ....

-- 

	William A. Mahaffey III

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