From mboxrd@z Thu Jan 1 00:00:00 1970 From: John Robinson Subject: Re: [Benchmarks] How do I set the memory invalidate bit for a 3ware 9550SXU-12 controller? Date: Thu, 08 Jan 2009 23:52:21 +0000 Message-ID: <496691B5.2020607@anonymous.org.uk> References: Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: Sender: linux-raid-owner@vger.kernel.org To: Justin Piszcz Cc: Linux RAID List-Id: linux-raid.ids On 08/01/2009 14:20, Justin Piszcz wrote: > System = RHEL5 x86_64 > Kernel = 2.6.18-53.1.13.el5 Not on the topic of your query, but why are you running a year-old kernel? There have been about 10 updates since then. [...] > Also tried: > # setpci -d *:* e6.b=2e Eeek, don't do that, that's asking for trouble, throwing settings at every PCI device in your system. Really, you should look up the PCI spec and see. If you're sure you're not going to hose your system and lose data, or you don't care for the sake of experiment, you might try: # setpci -s 03:01.0 COMMAND=0:0010 that's -s 03:01.0 to select your card by its bus and slot, COMMAND to play with the command register, 0 to set to zero, 0010 as a mask to affect only bit 4. But I may have got it wrong - as I said you should look up the PCI spec for yourself, as well as the setpci man page - and in any case I take no responsibility if it goes wrong. Cheers, John.