HP IO Accelerator Driver and Management Software Version 2.2.1 Release Notes

Change log 11
CAUTION: HP does not support the use of ext4 in Kernel.org 2.6.33 or earlier. Ext4 in
Kernel.org 2.6.33 or earlier might silently corrupt data when discard is enabled. This has been
fixed in many kernels provided by distribution vendors. Verify with your kernel provider that your
kernel supports discard. For more information, see "Linux-specific issues (on page 14)."
NOTE:
On Linux, MD and LVM do not currently pass discards to underlying devices. Therefore,
any IO Accelerator device that is part of an MD or LVM array do not receive discards sent by the
filesystem.
Trim on Windows
Trim is enabled by default in the Windows® IO Accelerator driver Version 2.2.0 and later. For a complete
description of Trim support on Windows®, see the "Trim support" section of the HP IO Accelerator version
2.2.1 for Windows User Guide.
NOTE: Windows® operating systems do not support Trim with a RAID 5 configuration.
Trim on Windows Server 2008 R2
Windows Server® 2008 R2 has built-in Trim support. IO Accelerator devices work with Windows® Trim
commands by default.
Trim on Windows Server 2003 and Windows Server 2008 R1
Windows® Trim is not built into Windows Server® 2003 or Windows Server 2008 R1. However, the HP IO
Accelerator Trim service is installed with the Windows® ioMemory VSL, and it provides the necessary Trim
operations.
The HP IO Accelerator Trim service is enabled by default unless it detects an operating system that supports
Trim (such as Windows Server® 2008 R2). You can disable the HP IO Accelerator Trim service by using the
fio-trim-config utility. For more details, see the HP IO Accelerator Version 2.2.1 for Windows User
Guide.