[MagicAndre1981]

the IP Helper service from Windows causes the high CPU usage (91.11%). Update the Atheros AR9285 802.11b/g/n WiFi Adapter and Realtek PCIe FE Family Controller drivers first and if this doesn't solve it, stop the service.

This post has been edited by MagicAndre1981: 04 May 2011 - 07:54 AM

[fsuphd]

Hi,

Just finished getting a new system up - ASUS P8P67, Intel I-Core 5-2500K, 8GB (2x4GB) Corsair DDR3 -1600, EGA GeForce 9400 GT Video card, 650W Power Supply, Windows 7 Ultimate. Using 2 logical HDD's (each as a RAID 1) attached to the Intel SATA 3.0 ports and 2 DVD-RW's attached to the Intel SATA 6.0 ports. Marvell SATA 6.0 ports used for external ports. No Overclocking used. Basic applications (e.g. Office 2007, Quicken, Adobe, etc.) installed. System will run for a variable amount of time and then the "System" process takes over 25% of the CPU usage but brings the system operation to a halt. Periodically, cycles will be made available but not for very long - seconds at most. The typical timeframe is in the 20 min. range but I have run for 2 - 3 hours a couple of times. I did run an Xperf trace once and the big user was "iaStor.sys!?" but I'm not sure how to interpret that result.

I also talked with ASUS and Intel (iaStor.sys is their module) but got nada from them - am I using the most current BIOS?(Yes!), do I have the most recent drivers? (Yes!), have I done a clean install? (Yes - multiple times). Well, then, it's not our problem (my paraphrase). So I'm hopeing someone else out there has run into this situation and can point me in a new direction.

Thanks for any help on this very frustrating situation,

John...

[MagicAndre1981]

can you upload the trace file, please (zip it and upload it to mediafire.com)?

[fsuphd]

Thanks. Here is the link - http://www.mediafire...68l2biirbaby9t. Let me know if you need anything else.

John...

[MagicAndre1981]

yes it is correct. The iaStor.sys drivers allocates some memory (kernel pool memory) and this causes the CPU usage. This driver belongs to the Intel Storage drivers. Do you have the latest drivers installed?

Have you tried to connect the HDDs to the SATA6GB Ports?

[fsuphd]

According to Intel I do have the correct drivers installed. As for the other SATA ports, since I have 2 logical drives, I need 4 ports which means I have to use at least 2 of the "regular" SATA connections since the Marvell SATA's are for data only, not RAID. Guess I can try spliting the logical drives - one on the 2 6GB ports and one on the regular ports. Though I have run the system with only one logical connected and get the same problem.

Appreciate the look see and confirmation of what the data suggests. Guess my next approach is to RMA the mobo and try a different one. Any recommendations for a non-gamer type mobo?

[MagicAndre1981]

No sorry, I'm an AMD user. So I have no ideas about good Intel boards.

Ask it in the Hardware forums:

http://www.msfn.org/...rdware-hangout/

[skoob]

hey again, thanks for the help earlier. unfortunately the driver update did no difference. i did however read somewhere to look if i could see "tunnel adapters for ISATAP, 6to4, or Teredo" when running ipconfig /all, which i tried, the odd thing was that instead of a few lines with the usual ipconfig stuff i got a long list of (roughly translated):

Tunnel connection: Connection to local network* 1
State: Disconnected
Connection specific DNS-suffix: ___ (as in nothing)

Tunnel connection: Connection to local network* 2
State: Disconnected
Connection specific DNS-suffix: ___ (except for the last one where its said LAN)

and so on until 680ish. im guessing that this isnt good and could be whats draining the cpu, right? Any advice on what this means or how to reduce or remove these tunnel connections?

Thanks

[MagicAndre1981]

I doubt that this will cause cpu usage. can you share a new trace?

[skoob]

yes!! finally worked! it was the 6to4 microsoft adapters that was the problem... i had 690 of them (see picture), used devmanview and was able to uninstall them all in a few mins and the cpu usage went down. i seem to have quite a large amount of copies of different other devices too but im not sure i want to mess around with that at this point since it seems to work quite well, is a total 287 devices in the device manager alot?

it would however be nice to know why this happened to i can stop it if it is still going on... any ideas?

/marko

Attached File(s)

•  prob1.jpg (235.6K)
  Number of downloads: 36

[MagicAndre1981]

I have never seen this. Start a new topic in the Windows 7 forums and ask why so many items show up on your Windows.

[Dragonmaninferno]

Hello,

For the past month my CPU has been going from 0%-40% sometimes even to 100%. I checked the resource monitor and saw that NT Kernel and System is responsible but I don't know what program or application is causing the problem. I performed a trace and I have the result up on mediafire. I'm using Windows 7 x64. Can you help?

http://www.mediafire...juwv0msgpwaguuk

[MagicAndre1981]

Hi,

as you can see in the picture the iastor.sys causes 16% of the CPU usage.

 System.png (5.36K)
Number of downloads: 17

This driver belongs to the Intel storage driver. You use version 10.1.2.1004. Is this the latest version? If not, update the driver. If this is the latest driver, use the version before this driver. If the issue still occurs, check your Hitachi HDD for errors (run chkdsk C: /r /f) and run a diagnostic tool from Hitachi.

André

[Dragonmaninferno]

Ok I'm not too good with computers but I went to Device Manager and went under Disk Drives and found Hitachi HT followed by some letters and numbers. Is this the one I have to uninstall? I checked for updates but it said everything was good.

[MagicAndre1981]

no, Hitachi HTS547575A9E384 is your hard drive. You must update the Intel Storage driver. Go to the homepage of your laptop creator, download the latest drivers and install them.

[Dragonmaninferno]

Ok I downloaded and installed the update. If the problem happens again I'll do what you suggested in your other post. Thank you for helping André

[MagicAndre1981]

You're welcome. Post again if the issue is back.

[Dragonmaninferno]

Ok it's happening again. How Do I delete the driver? I tried looking for the previous driver on the HP website but I can't find it. Do I have to keep searching or is there somewhere else I can find it?

EDIT: Nevermind I found out how to uninstall and I found the previous version. Once again thanks for your help André.

This post has been edited by Dragonmaninferno: 22 June 2011 - 08:25 PM

[MagicAndre1981]

run chkdsk to check the HDD.

[Jaroin]

Hi. I am actually writing on behalf of someone else. They have Vista 32 bit. Is this software for Vista too, or just Windows 7? Thank you