Faulty Snow Leopard Disks

Y

Yewborough

Registered
Currently using Leopard 10.5.8, I ordered Snow Leopard and on attempting to install, after a few minutes an error message appeared saying clean the disk.
On ejection I discovered four rings on the disk, 10mm from outer edge, which presumably are causing the problem.

A replacement disk arrived today and exactly the same thing has happened.
Phone Apple and they are sending a 3rd disk.

Nobody seems to know why this is happening as it does not occur on any other disks and the optical drive has been cleaned.

Anyone, any ideas?
 
Now that you'll get the new replacement... observe it fully before trying installation and before inserting the disc. Any rings on it? If it's all clean, try again.
There could always be a bad batch of discs - but for using hte third disc, I'd definitely make sure it looks fine before trying.. to at least eliminate some potential points in the chain of failure.
 
Hello - thanks for your comments.

I did check the second replacement and it looked perfectly ok - no rings.
On ejection, after it wouldn't load and showed the same clean disk error message, I looked at it and noticed the exact same rings as the first disk.

I really don't understand why, if there is a fault with the drive, there aren't rings all over the disk? Neither can Apple support, which is why they are sending the third disk.

I'm wondering whether to buy an external optical drive as it would be very strange to receive three faulty disks.
 
What Mac do you have? It could be there's some dirt in the drive or if slot loading in the fluff. If there were no rings before and there were after it's probably not a manufacturing error then.
If you do (or can loan) have an external drive I'd give it a shot.

Are you able to use any discs now without getting those scratches? Would you have e.g. a CD with data that doesn't really matter, just to see what would happen if you try to read that?
 
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