Strange HD Tune Results

[Blitz KriegeR]

I just ran HD tune on my primary and secondary HDs and got a somewhat worrying result, one that I've never seen before.

Primary HD

Secondary HD

Why does the transfer rate keep bottoming out like that? Should I be worried about this?
Comments appreciated, thanks!

 

[SunSamurai]

Either your drive is dieing, your mobo is buggy, virus, PSU, CPU100% spikes---could be alot of things.

Id start with a SMART scan of the drive.

 

[Deathonastick]

I saw a similar thing before I updated the firmware on my freeagent drive. Now it runs like a champ.