HP IO Accelerator Driver and Management Software Version 3.2.3 Release Notes

Errata 25
Switching interrupt types with newer kernels might cause errors
With newer Linux kernels, switching interrupt types after initial driver load might cause the kernel to report
doIRQ errors. As a workaround, reboot your system before loading the driver with the new interrupt type
specified.
kdump crashkernel requires additional memory for the IO
Accelerator
With the IO Accelerator driver installed, kdump might fail to generate a complete dump due to a lack of
reserved memory. To ensure that you have enough memory, increase the memory allocated to the
crashkernel.
The amount of memory required varies, depending on your kernel version and the formatted sector sizes
(more RAM is required for 512B sector sizes than for 4K sectors). You can format the device sector size, using
the fio-format command. As a best practice, increase the crashkernel reserve by approximately 50
to 250 MB of RAM, depending on your configuration.
Do not use an IO Accelerator device as a kdump target
Do not direct kdump to dump the crash information to an IO Accelerator device. The IO Accelerator VSL
software does not load in the kdump crashkernel, and IO Accelerator devices are not supported as kdump
targets.
VMware-specific issues
Hypervisors cannot directly use devices with capacities greater
than 2 TB
Because the VMFS in VMware hypervisors do not directly support devices with capacities greater than 2 TB,
you cannot use all of the capacity of a 3.0 TB MLC ioDrive2 device when using the device as a LUN. You
must down-format the device to 2 TB using fio-format. For example, (using SSH):
fio-format -s 2T /dev/fct1
You can use the entire capacity of the 3.0 TB MLC ioDrive2 device if you use VMDirectPathIO/PCI
Passthrough to pass the device through to a guest OS that supports devices with capacities greater than 2 TB.
ESXI 5.0 Update 1 firmware upgrade
The fio-update-iodrive.py remote script is currently unsupported on ESXi 5.0 Update 1. To perform a
firmware update on ESXi 5.0 Update 1, use the fio-update-iodrive utility as documented in the HP IO
Accelerator user guide for VMware ESX and ESXi.