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Getting event ID 51 on SBS 2008

I have a SBS 2008 box with two USB drives plugged in for backups

For both drives I'm constantly getting a Warning Event ID 51.

I have already replaced the both drives and USB cables.

Here are the Event ID details

 
Log Name:      System
Source:        disk
Date:          24/04/2011 6:00:21 AM
Event ID:      51
Task Category: None
Level:         Warning
Keywords:      Classic
User:          N/A
Computer:      SBSERVER.kargomax.local
Description:
An error was detected on device \Device\Harddisk2\DR16 during a paging operation.

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Log Name:      System
Source:        disk
Date:          24/04/2011 6:00:08 AM
Event ID:      51
Task Category: None
Level:         Warning
Keywords:      Classic
User:          N/A
Computer:      SBSERVER.kargomax.local
Description:
An error was detected on device \Device\Harddisk1\DR15 during a paging operation.

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Any ideas why?
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Gerhardpet
Asked:
Gerhardpet
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1 Solution
 
K_WilkeCommented:
There are several things it could be and not knowing your hardware on your server here we go:
1)  From a newsgroup post: "A Buggy NForce SATA driver caused the problem. Disabling Native Command Queuing (NCQ) in the Nvidia SATA driver resolved it"
2)  Going to "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management\PrefetchParameters" and setting the value for "EnablePrefetcher" to 1 could solve the problem.
3)  We used the "/PAE" and the "/3GB" switches on the server to increase available memory to 8GB. The paging file was set to anywhere from 2048 to 4096. At one point, we let the server set the paging file at a whopping 8000 MB. The paging activity increased so much that it caused disk thrashing on the server and these errors were logged. The server would then slow to a crawl and more or less had to be rebooted. After removing the "/PAE" and the "/3GB" switches, the error has not been encountered under similar user loads. Rather than using the full 8GB of RAM, we put the RAM into 4GB with mirroring instead.
4)  If you have the paging file on the same physical disk as the virtual disk then you will get this error.  Move the paging file to another disk.
Hope this helps.
Kelly W.
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GerhardpetAuthor Commented:
I'm not sure if I understand point #4

Can you explain in more detail?
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K_WilkeCommented:
Some admins have a physical disk split into different virtual disks and then have a paging file on one of those.  W2K8 doesn't like that so much.
Thanks,
Kelly W.
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GerhardpetAuthor Commented:
That is my case but then the Event ID errors are coming up on the USB backup drives

I will try your other suggestings and see if anyone of them will fix it.
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GerhardpetAuthor Commented:
I checked and for suggesting # 2  I don't see the value for "EnablePrefetcher" in "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management\PrefetchParameters"

Should I add it?
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K_WilkeCommented:
I would say yes and see what happens.
If it does not work then immediately take it out.
Thanks,
Kelly W.
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GerhardpetAuthor Commented:
Tried the reg edit and it does not solve the problem

Also on point # 4 I think I may have misunderstood you.

What I have is a SBS 2008 with two physical disks configured as RAID 1. I have two partitions on it one for the OS and one for DATA. From what I understand then your scenario does not apply

Also the Event ID is coming from the USB backup drive. On that same drive I now got this error once

G:\ is not accessible, Incorrect function

But after getting this error once I was able to access it again.
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K_WilkeCommented:
Okay, I wonder if the OS thinks that the USB drive can do write cache?
Disable the “Write cache” feature on the USB drive. To do this go to Device Manager -> Disk Drives, right click on your disk and choose Properties. Here you can disable this feature.
Thanks,
Kelly W.
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GerhardpetAuthor Commented:
I don't have the write cache feature on the USB drive. I only see it on the main drive where I have Partition C and D on.

I would really to fix this because the backups fail sometimes and I contacted Storage Craft about the problem and they blame on the Event ID 51
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K_WilkeCommented:
Okay it looks like from everything I have seen online that when you have multiple USB drives connected to a server that this could happen.
If you cannot disable write caching, then make sure that the drives do not go into sleep mode.
The only other fix is to connect a USB hub in between the server and the two USB drives as this seems to be an issue with multiple USB drives plugged into a Windows server.
Thanks,
Kelly W.
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GerhardpetAuthor Commented:
How can I make sure the drives don't go in to sleep mode?

I already have a USB hub installed.
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K_WilkeCommented:
Under Device Management => then USB settings =>right click on each unit (such as USB root hub) and then click Properties.
Click on Power management tab and uncheckmark the Allow the computer to turn off this device to save power.
You might have to reboot for a server when done, though I am not sure.
Thanks,
Kelly W.
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GerhardpetAuthor Commented:
Tried your last suggesting which has not solved the problem
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K_WilkeCommented:
Are there any other warning events or error events in the event viewer near this one?
Thanks,
Kelly W.
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GerhardpetAuthor Commented:
I will check later on today
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GerhardpetAuthor Commented:
Thank you for your help!
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