[wellylug] LiveCD boot problem after changing DVD drive

[Hong Chyr]

Guys

Thanks for the suggestions. You're right, I should have tried the 
obvious by burning another CD with a last know good ISO.

Here's the verdict:

1. Old BT2 LiveCD, which used to run fine on the laptop, after drive 
change, failed to boot.
2. Burnt another copy of the same ISO file to CD, checked MD5 of ISO 
against the CD media, the hash matched. BUT it will not boot!
3. The old and newly burnt CDs booted fine on my desktop.

Seems like the new DVD drive can read/write the whole CD, and I can 
browse files on the CD without any problems. Just that when booting the 
LiveCD it seem to be stuck at some stage, complaining some parts of the 
LiveCD filesystem is missing. I would say that the new DVD drive have 
some hardware compatibility issues, but as long as the SATA chipset is 
supported and it can read the entire CD, I can't understand why the 
LiveCD can't boot?

Something else to note:
1. Ubuntu Gutsy CD booted OK, and I can install without any problems.
2. Downloaded Knoppix 5.1 and burnt the ISO, LiveCD booted perfectly.

Any ideas?

Hong


Jethro Carr wrote:
> On Wed, 2008-01-02 at 16:19 +0000, Colin Templeman wrote: 
>   
>> Hong Chyr wrote:
>>
>>     
>>> A few weeks ago, I was having problems with the laptop's built-in DVD
>>> writer and Dell came to replace the driver unit. Ever since then, when I
>>> tried to boot the LiveCD, it always fail.
>>>       
>> Hello Hong,
>> Since you don't say otherwise, let's rule out the obvious.  Is it possible that
>> the problematic CDs were created in your original (faulty) drive and the Ubuntu
>> CD wasn't?
>> Try burning an ISO again on quality CD media in your new drive and check it
>> boots ok, then test disc in another PC.  Repeat, but with a manufactured
>> (silver) bootable CD.  This should determine whether your new drive is faulty or
>> not.
>>     
>
> Colin's theory and suggestion seems pretty sound.
>
> I remember reading back in the day of floppy drives, it was possible for
> a drive to get mis-calabrated and successfully read/write data to the
> disk, but all other drives would be unable to read it.
>
> There's no reason why the same could not happen to a CD drive.
>
> Perhaps your previous drive was slightly mis-calebrated, and the spacing
> or angle of the pits were off. Some drives would be more accepting and
> be able to read the disks but other drives may complain about it.
>
>
>   
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