Important This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:
322756How to back up and restore the registry in Windows
Note: All of the registry changes in this section require a reboot to take effect.This problem can be worked around by configuring Windows registry settings to increase the number of worker queue threads, and increase the delay between path verification commands.
Steps to modify the worker thread registry value:1. Click Start, type regedit in the Start Search box, and then click regedit in the Programs list.
If you are prompted for an administrator password or confirmation, type your password or click Continue.
2. Locate and then click the following registry subkey:
· HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Executive
3. In the details pane, right-click AdditionalCriticalWorkerThreads , and then click Modify.
4. In the Value data box, type 10 (with Base set to Hexadecimal, or 16 in Decimal), and then click OK.
5. Right-click AdditionalDelayedWorkerThreads , and then click Modify .
6. In the Value data box, type 10 (with Base set to Hexadecimal, or 16 for Decimal), and then click OK.
Note: You can specify a value that is between 0 and the maximum value of 0x64 (hexadecimal), or 100 (decimal), for both of these fields. If a larger value is specified, the maximum value will be used.Exit Registry Editor.
Steps to modify the path verification registry values:The PathVerificationPeriod is only relevant if path verification is enabled. To verify whether or not path verification is enabled on your system, see the following registry entry:
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\MPIO\Parameters\
| Setting | Definition |
| PathVerifyEnabled | Flag that enables path verification by MPIO on all paths every N seconds (where N depends on the value set in PathVerificationPeriod).
Type is boolean and must be filled with either 0 (disable) or 1 (enable). By default, it is disabled. |
1. Click Start, type regedit in the Start Search box, and then click regedit in the Programs list.
If you are prompted for an administrator password or confirmation, type your password or click Continue.
2. Locate and then click the following registry subkey:
· HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\mpio\Parameters
3. In the details pane, right-click PathVerificationPeriod, and then click Modify.
4. In the Value data box, type 3C (with Base set to Hexadecimal, or 60 in Decimal), and then click OK.
Exit Registry Editor.