As David said, it seems impossible that two drives
would
develop the same flaky behaviour at the same time.
It isn't, assumed a controller on the mobo is broken and not the drives.
In this case I don't think it is, but it's possible. Anyway, especially
when using SATA connectors without clips, reconnecting the cables
sometimes heels voodoo. I had issues that portend to a weak power
supply, before ordering a new one, I yesterday reconnected the SATA
cables and the voodoo seems to be gone.
What if you burn another full length CD with different
material? What
if you burn those remaining tracks on a CD separately?
Sounds like the best idea to track the cause, but ...
(You'll have lots of frisbees to play with!)
... How about buying a CD-RW ;) instead of becoming a frisbee sportsman?