Files Needed For Bfad.sys Message Appears; Cannot Roll Back Driver On All Adapter Instances Using Device; Manager; Device Drivers Not Loading Due To Lack Of Msi-X Interrupt - Dell Brocade Adapters Troubleshooting Manual

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General adapter problems
Action: Take the following actions:
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Files needed for bfad.sys message appears

If a "Files needed for bfad.sys" message appears on Windows systems when removing a driver,
refer to the following possible cause and recommended action to help resolve the problem.
Possible Cause: A "Files needed for bfad.sys" message will occur if you perform the following
sequence of steps.
1. Install the driver using the driver installer program (brocade_installer.bat) or Brocade Adapters
2. Uninstall the Brocade adapter using Windows Device Manager.
3. Re-install the driver using the driver installer program (brocade_installer.bat) or Brocade
4. Uninstall the driver using the driver installer program (brocade_installer.bat) program.
Action: To avoid the message when removing a driver, do not uninstall the driver using the Device
Manager if you have used Brocade installer driver installer programs to install driver instances.
Always use the Brocade installer programs. If only one driver is present in the system, then the
Brocade programs also remove the Fibre Channel devices from the Device Manager.
Cannot roll back driver on all adapter instances using Device Manager
If you cannot roll back the driver for all adapter instances using Windows Device Manager, refer to
the following descriptions of possible causes and recommended actions to help resolve the
problem.
Possible Cause: Installing the driver using the Brocade driver installer program
(brocade_installer.bat) or Brocade Adapters Software Installer (GUI or command-based
application), then rolling back driver adapter instances using the Device Manager.
Actions: Perform the following actions:
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Device drivers not loading due to lack of MSI-X interrupt vectors
Due to a lack of MSI-X interrupt vectors on VMware systems, device drivers are not loading
completely as not enough vectors are available for proper operation.
Possible Cause: A large number of adapters and other devices in the system causes the operating
system to run out of MSI-X interrupt vectors. This is most visible in ESX 4.x where VMware supports
up to 224 interrupt vectors shared by all the devices.
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Rescan for the devices in the Device Manager.
Ignore the error message.
Software Installer (GUI or command-based application).
Adapters Software Installer (GUI or command-based application).
Install the driver for each adapter instances using the Device Manager, then roll back the driver
using Device Manager.
Use the driver installer script (brocade_installer.bat) or Brocade Adapter Software Installer (GUI
or command-based application) to install or upgrade the driver, then use the Brocade Software
Uninstaller to roll back drivers on all adapter instances in one step.
Brocade Adapters Troubleshooting Guide
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