Seagate ST31500341AS 1.5TB

I originally had requested the RMA for both drives because I was concerned that the second one would show additional reallocation errors. However, I must confess that I am not so eager to exchange the second drive (drive 4 in my array) at this point. My log shows that on December 26, 2008, the reallocation count went from 0 to 2 on that drive. Since then, though, I have not had any other error messages for Drive 4. In contrast, Drive 1 was up to 41 reallocated sectors as of today, with almost daily increases. So, there's no doubt in my mind about exchanging Drive 1. Still a bit on the fence for Drive 4. In the meantime, knock on wood, I've had no error messages for Drives 2 and 3.