From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tejun Heo Subject: Re: Linux Software RAID is really RAID? Date: Wed, 04 Jul 2007 10:20:56 +0900 Message-ID: <468AF5F8.9060703@gmail.com> References: <46815C3F.6090204@wasp.net.au> <468A05A4.60006@gmail.com> <468AD708.2010806@rtr.ca> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <468AD708.2010806@rtr.ca> Sender: linux-ide-owner@vger.kernel.org To: Mark Lord Cc: Johny Mail list , Brad Campbell , linux-raid@vger.kernel.org, linux-ide@vger.kernel.org List-Id: linux-raid.ids Mark Lord wrote: > I believe he said it was ICH5 (different post/thread). > > My observation on ICH5 is that if one unplugs a drive, > then the chipset/cpu locks up hard when toggling SRST > in the EH code. > > Specifically, it locks up at the instruction > which restores SRST back to the non-asserted state, > which likely corresponds to the chipset finally actually > sending a FIS to the drive. > > A hard(ware) lockup, not software. > That's why Intel says ICH5 doesn't do hotplug. OIC. I don't think there's much left to do from the driver side then. Or is there any workaround? -- tejun