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VMware ESX Guest OS I/O Timeout Settings for NetApp

25 February 2009

I’ve had a few Windows machines crash due to disk timeouts. I don’t feel as though this should happen as the guest’s are on local storage but it does! Here’s NetApp’s recommended fix.

Installation:

In your Windows Guest OS, copy the lines below into a new Notepad file (Start > All Programs > Accessories > Notepad). Note: Make sure the last line is a blank line, otherwise the registry merge won’t work.

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Disk]
“TimeoutValue”=dword:000000be

Name the file as windows_gos_timeout.reg

Change the “Save as Type” to “All Files” and save it to your Desktop

Right click the file and select Merge

The following dialogue box is displayed:

Are you sure you want to add the information in [path of .reg file] to the registry?

If you click Yes, you receive the following message:

Information in [path of .reg] file has been successfully entered into the registry.

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