harddrive error?

[andrew at mediashell.org]

i get a spam of errors on the screen that looks something like this

ad4: WARNING - READ_DMA UDMA ICRC error (retrying request) LBA=137895
ad4: FAILURE - READ_DMA status=51<READ,DSC,ERROR> error=84<ICRC,ABORTED> 
LBA=293567

i have no idea