Hello, dumping my config 1st:
CPU:      AMD Athlon II X2 250 3000MHz 
MB:        GA-890XA-UD3  Rev 2.0, latest BIOS (FDA)
RAM:      2x 2GB Corsair CM3X2G1333C9
VGA:      Gigabyte Radeon 5670 Zalman Cooler
Storage:   Raid-0  = 2x ST3320418AS (320GB), partitions:
c:\ 100 GB total, 40GB free
d:\ 100 GB total, 36 GB free
e:\ 150 GB total,  19 GB free
f:\ 150 GB total,  6 GB free
g:\ 96 GB total, 39 GB free
OS:        Windows Vista Home Premium 64b
Driver Packaging Version
9.012-121219a-152192C-ATI
Problem:
Once in a while (let's say daily) my PC freezes for about 5 minutes, and resumes normaly. When freezing starts, i can see (red diode on my case) and hear intense HDD activity. 
RaidXpert reports:
1 AMD Chipset SATA Controller - Controller 1 Error 2013/04/02 22:54:43 Unknown Event 
2 AMD Chipset SATA Controller - Controller 1 Error 2013/03/24 17:45:31 Unknown Event 
3 AMD Chipset SATA Controller - Controller 1 Error 2013/03/23 18:52:54 Unknown Event 
4 AMD Chipset SATA Controller - Controller 1 Error 2012/12/25 16:49:02 Unknown Event 
5 AMD Chipset SATA Controller - Controller 1 Error 2012/12/03 19:38:28 Unknown Event 
6 AMD Chipset SATA Controller - Controller 1 Error 2012/11/24 22:01:29 Unknown Event 
7 AMD Chipset SATA Controller - Controller 1 Error 2012/11/16 00:38:47 Unknown Event 
8 AMD Chipset SATA Controller - Controller 1 Error 2012/11/15 22:59:26 Unknown Event 
9 AMD Chipset SATA Controller - Controller 1 Error 2012/10/07 15:12:21 Unknown Event 
10 AMD Chipset SATA Controller - Controller 1 Error 2012/09/02 12:28:18 Unknown Event 
System Event Viewer reports:
 <Event xmlns="
http://schemas.microsoft.com/win/2004/08/events/event">
- <System>
  <Provider Name="volmgr" /> 
  <EventID Qualifiers="49156">49</EventID> 
  <Level>2</Level> 
  <Task>0</Task> 
  <Keywords>0x80000000000000</Keywords> 
  <TimeCreated SystemTime="2013-04-28T22:56:16.076Z" /> 
  <EventRecordID>611618</EventRecordID> 
  <Channel>System</Channel> 
  <Computer>Zulmas</Computer> 
  <Security /> 
  </System>
- <EventData>
  <Data>\Device\HarddiskVolume1</Data> 
  <Binary>000000000100000000000000310004C001400000230000C000000000000000000000000000000000</Binary> 
  </EventData>
  </Event>
Any suggestions?
Should i worry about my Raid setup?
I do realize that if raid fails, I'll loose all data ....