HP IO Accelerator Driver 3.1.1 Release Notes

Errata 13
Errata
Overview
This section describes issues you might encounter when using the IO Accelerator driver release.
General issues
Keep default MSI interrupts for better performance
With IO Accelerator version 3.x and later, all IO Accelerator devices changed from using legacy-style
interrupts to MSI. This improves performance while decreasing CPU load.
If you want to continue using legacy interrupts, set the disable_msi VSL module parameter value to 1. For
examples on setting module parameters, see the "Module parameters" section in the HP IO Accelerator User
Guide for your operating system (Windows uses the fio-config utility and the parameter is in all caps:
DISABLE_MSI).
In limited situations, using legacy interrupts with the 3.x.x series driver might degrade performance as much
as 10% compared to previous releases. With the 3.x.x series driver, HP strongly recommends that you use
MSI (default setting) for optimal performance.
Firmware archive number might differ from firmware version
number
When the firmware archive file for this release is used to update devices, newer IO Accelerator devices, such
as the IO Accelerator Gen2 device, will be updated to firmware version 107004. Previous devices, such as
the IO Accelerator Gen1 device will be updated to firmware version 107006 or 107007.
The installed firmware version number might differ from the firmware archive filename. However, the correct
firmware version is still installed.
Firmware update might fail with a TDO mismatch error
An IO Accelerator device firmware upgrade might fail with the following error:
ERROR: TDO mismatch
This error generally occurs when upgrading multiple devices at the same time.
To resolve this issue, update the devices again, but perform the update one device at a time. For IO
Accelerator Duo devices, upgrade each IO Accelerator device (on the duo product) individually.
Do not reboot the system until the devices have been successfully updated.