Re: Is CD inconsistent for different readers like floppies?

wrote:
> We know that floppies written by one machine can be difficult to
> read by a different machine, because of expected mechanical
> differences between the machines.
>
> So also the tolerance/settings of diffeent CDreaders is expected
> to give similar problems
>
> I normally don't use CDs, so I've just got 2 scrap CDreaders
> which I plugin if I need to read a CD, which I've tried now
> that a friend has posted 2 CD from the other side of the planet.
>
> I've noticed that the one reader works well with old RH6.2
> linux but not with later versions.
>
> Also since I need to boot from the 1 CD I have to use the BIOS.
> And since both my machines show differing 'errors', it suggests
> that a marginal mechanical setting exists.
>
> Do CDreaders auto adjust, so that the mechanics of different
> readers is equaled out ?

Some readers just aren't very good at reading writable disks. And
it sometimes depends on brand and type of writable disk.

In news:49e0aca0$0$7810$ Andrew Gideon wrote:

> the disk appears to read fine elsewhere, but the Sony cannot boot
> from the
> DVD. It prints the first ISOLINUX line and then repeatedly makes
> "grinding" noises trying to read the DVD.

Hi Andrew, looks like the format of the DVD is not known?

> I am able to mount the disk on the Sony under Fedora, but I get the
> same "grinding" when I try to copy vmlinuz off of it. When I do
> this, I get errors of the form:

I don't know Fedora but it looks to me like "invalid/unreadable format".

> Problem reading a writable disk? Is there anything I could do in
> writing the disk to make success more likely, or do I have to dig up
> blank CDs somewhere?

May be a problem of incompatible driver?
Horst