BSOD driver detected a controller error

Hello everyone,

Today I was just playing some call of duty and suddenly my pc froze and I received a bsod. It was rather fast and couldn't write down the numbers displayed on screen.
After I checked my event viewer I found this:

Log Name: System
Source: Disk
Date: 12/5/2010 9:58:56 PM
Event ID: 11
Task Category: None
Level: Error
Keywords: Classic
User: N/A
Computer: Rodje2k10
Description:
The driver detected a controller error on \Device\Harddisk2\DR2.
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
<System>
<Provider Name="Disk" />
<EventID Qualifiers="49156">11</EventID>
<Level>2</Level>
<Task>0</Task>
<Keywords>0x80000000000000</Keywords>
<TimeCreated SystemTime="2010-12-05T20:58:56.843851200Z" />
<EventRecordID>5856</EventRecordID>
<Channel>System</Channel>
<Computer>Rodje2k10</Computer>
<Security />
</System>
<EventData>
<Data>\Device\Harddisk2\DR2</Data>
<Binary>0E01800001000000000000000B0004C003010000000000000000000000082D0000000000000000001C0E090000000000FFFFFFFF0600000058000000000000000000061208000010000000003C000000000000000000000040B84A0880FAFFFF0000000000000000601C340480FAFFFF0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000</Binary>
</EventData>
</Event>

I assume the error was caused by one of my harddrives. Since the error I have not encountered any other hiccups, but would like to know what really caused this error and what to do if it returns (or possibly prevent it from re-occuring).

My system has just had an upgrade. I swapped my old WD 500Gb drive for an OCZ Vertex 2 120Gb SSD.

System Specs:
Asus Maximus II Formula
Intel Q6600 @ 3.2Ghz
Corsair 800 Mhz DDR2
OCZ vertex 2 120Gb
WD 500Gb (storage)
ATi 4850

Do any of you know what could have caused this BSOD and how can I prevent it from happening again?

Many thanks,

P.R