Although the only reference I could find was with a Maxtor issue...

http://www.theinquirer.net/?article=29570

i tried googling but didn't understand what i found... you can say that i'm a little moob w/ these new stuff... heheh sorry

I'm not so expert either when it comes to the absolute latest, I just remember reading something someplace about NCQ compatibility issues a couple of months ago.  I would suggest starting with the websites of your motherboard manufacturer and of Seagate to see if there is anything regarding the issue.

I don't know if you can even do this, and if you can - how to do it.  But if you could disable NCQ and let drive operate in an "old fashioned" mode for a little while, then check for those error messages.  The description of your error message is what got me on the whole NCQ issue, but I could be totally off.

one thing that i get is that Seagate File System checker says that my file system have errors and i should run scandisk w/ /f , but after doing that, it still reports that my file system have errors

Don't you love when Microsoft has/knows about typos and doesn't correct them?! I know I do...
instead of "Scandisk /F" the command that it actually means is "CHKDSK /R" ( /F switch doesn't exist )

It could be that the hard drive is just fine but something isn't working properly between the controller (on the motherboard) and the NCQ on the drive.  You may want to see if there are BIOS updates for the motherboard or firmware updates for the drive.  All of these new technologies coming out these days seem half baked at best with each vendor implementing things however they see fit.

Perhaps some googling may reveal others are having similar difficulties.

i tried googling but didn't understand what i found... you can say that i'm a little moob w/ these new stuff... heheh sorry

Perhaps some googling may reveal others are having similar difficulties.

best way to test your hardware is prime95 install the prog and start toturetest take the third test this will heat up your memory let this test run for 2h or longer when the memory has an problem then an fault message stops the test, then start the first test to check cpu heat. If this runs without Problems then it can be the mainboard sometimes nf4 has controller errors in ide or sata. Also sometimes but not offen the cpu is the problem because the memorycontoller is in it.

cHarOn

nearly in my 2H of testing and prime95 still not showing any errors... i think i'll keep it going for a few more hours then try the cpu test

thanks for your help guys, i hope i get this event 51 fix

cHarOn

Try running HD Health from here:

http://www.panterasoft.com/

It'll monitor the SMART stats for your HD, and can warn you if it is about to fail. I've run it for months, useful program.

thanks, i'll try that one and post the result

EDIT:

Weird, my  HD says that it supports NCQ, but this app says that NCQ is not supported

http://www.panterasoft.com/

It'll monitor the SMART stats for your HD, and can warn you if it is about to fail. I've run it for months, useful program.

also tried defragmenting.

one thing that i get is that Seagate File System checker says that my file system have errors and i should run scandisk w/ /f , but after doing that, it still reports that my file system have errors

Motherboard = EP-9NPA3 Ultra (NForce4)
RAM             = 512 MB DDR400
HD               = Seagate 80GB SATA II (ST3808110AS)
                   = single partition

I tried using Seagate's Diagnostic Tools for my Seagate HD but it returned no errors for all its test.

anyone can give me additional advise what to do?