Error Event ID 11

I recently replaced my hard drive on my Inspiron 8000 running W2k.  The prior hard drive had failed and I upgraded from the original Hitachi DK23BA-20 to a Toshiba MK4019GAX.  Prior to this switch I have had check disk errors all along but no serious consequences until the disk died.  I had assumed that switching hard drives would address the check disk problem but it did not.   I ran the extended Dell diagnostics but the drive had no errors.  I loaded the dis on a second machine (as a slave drive) I ran check disk and Norton antivirus with no errors and backed up my data. 
After searching on the internet I was able to identify Error Event Id: 11, Source: Disk, Description: The driver detected a controller error on \Device\Harddisk0\DR0 as the possible source of the problem.
This error appeared multiple times per hour in the log, and sometimes multiple times per minute.  This log can be found under Control Panel, Administrative Tools, Event Viewer, System Log.  Secondarily, but to a much lesser extent, Event Id: 5, Source: atapi, Description: A parity error was detected on \Device\Ide\IdePort0.
I contacted Dell support (3 calls in total) and described the Event ID 11 problem but they seem disinterested in this particular aspect.  The asked me to run the Dell diagnostics again (with no errors reported) and then asked me to repartition my hard drive and load Windows from scratch.
A reference on the internet suggested to change the IDE channel configuration in the Device manager from DMA to PIO.  This selection can be found under the advanced settings of the Primary IDE Channel Properties in the Device Manager.
This change resolved the error Event ID 11 (and 5) problem.  I also confirmed that turning on DMA would make the error Event ID 11 reoccur.
I contacted Dell support and they verified that the channel should have bee set for PIO for my Hitachi drive.  They said that my Toshiba (5400RPM) drive should have been capable of working in DMA mode but they would not support the resolution of that issue, as they had not installed the new drive.
Originally 2 Inspiron 8000 machines were purchased with the same configuration.  The second machine still has the original Hitachi hard drive and is running Windows XP.  This second machine is also exhibiting a high occurrence of error Event ID 11 but it does not seem to generate check disk errors.
I changed the IDE channel configuration on my machine yesterday to PIO and have not seen any Event ID 11 errors, or any check disk errors.  I have also not seen noticeable disk access slowdown.
I hope that others can benefit from my experience.  If anyone has further insight in this matter I would appreciate the feedback.