Hard Drive Issues

[Justin]

Greetings,
 
I'm getting the following errors on the terminal:
 
ad1: WARNING - READ_DMA UDMA ICRC error (retrying request) LBA=186691903
ad1: FAILURE - READ_DMA status=51<READY,DCS,ERROR> error=84<ICRC,ABORTED>
LBA=186691903
g_vfs_done():ad1s1d[READ(offset=95586222080, length=49152)]error = 5
 
And similar, with the LBA number, offset number, and error=84 changes to
error=10.
 
The hard disk drives and data seem to be remaining intact and working.  Can
someone direct me as to what these errors mean, and if they are serious?
 
Regards,
 
Justin P. Michel