Is my Plextor 800A on it's last legs?



Hi all;I have a Plextor 800A,has been a decent drive for about a year and 3 month’s now all of a sudden,DL burn speeds only burn 8x discs at 4x speed.
I’m also getting intermittent (Unknown disc) messages when I go to play a freshly burned disc on a DVD player.Burn again and it’s ok.Now I just burned a DL Disc and I get a Redundency Error? when trying to read it.Burned it again and it’s ok…Seem’s to be getting more and more coasters?Time to Retire?