Two separate Hard Drives corrupted in as many days... User error?

Edit- I set the machine to work last night testing memtester and badblocks (read only) both tests came back clean, so I assumed I was in the clear. Today, wanting to be extra sure, i ran a read-write badblocks test and watched dmesg while it worked. I got the same errors, this time on ata3.00. Given that the memory test came...