From owner-freebsd-hackers@FreeBSD.ORG Mon May 2 04:09:25 2005 Return-Path: Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id BC84B16A4CE for ; Mon, 2 May 2005 04:09:25 +0000 (GMT) Received: from multiplay.co.uk (www1.multiplay.co.uk [212.42.16.7]) by mx1.FreeBSD.org (Postfix) with ESMTP id C363443D1D for ; Mon, 2 May 2005 04:09:24 +0000 (GMT) (envelope-from killing@multiplay.co.uk) Received: from vader ([212.135.219.179]) by multiplay.co.uk (multiplay.co.uk [212.42.16.7]) (MDaemon.PRO.v8.0.1.R) with ESMTP id md50001374898.msg for ; Mon, 02 May 2005 05:04:48 +0100 Message-ID: <001701c54ecc$921546d0$b3db87d4@multiplay.co.uk> From: "Steven Hartland" To: "Kris Kennaway" References: <007901c54ec0$14bb3e30$b3db87d4@multiplay.co.uk> <20050502025305.GA29984@xor.obsecurity.org> <001c01c54ec4$1f58d880$b3db87d4@multiplay.co.uk> <20050502031444.GA40715@xor.obsecurity.org> Date: Mon, 2 May 2005 05:08:14 +0100 MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2527 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2527 X-Spam-Processed: multiplay.co.uk, Mon, 02 May 2005 05:04:48 +0100 (not processed: message from valid local sender) X-MDRemoteIP: 212.135.219.179 X-Return-Path: killing@multiplay.co.uk X-MDaemon-Deliver-To: freebsd-hackers@freebsd.org X-MDAV-Processed: multiplay.co.uk, Mon, 02 May 2005 05:04:49 +0100 cc: freebsd-hackers@freebsd.org Subject: Re: 5.4-STABLE corrupting fs on shutdown -p now? X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 02 May 2005 04:09:25 -0000 Kris Kennaway wrote:: >> Surely thats what the buffer sync is doing. Watching the console both >> these actions appear to be doing identical things but the end results >> are quite different :( buffers are always under 5 usually 2 and its not >> like there's been a great deal of activity. The last test I did was just a >> boot, login, shutdown ( result was / not clean but all the others ok ). > > Modern IDE drives sometimes lie about having finished writing out the > data, when in fact it's still only in cache. You should be able to > disable this behaviour to test (try the BIOS). I have a "HDD Post Write Buffer" in the BIOS according to the MB manual although the disks aren't connected to the MB controllers they are on RAID 5 set off a PCI-X card. Will give it a go tomorrow ( drag the monitor back to the rack ). Will this have any performance penalties? I could just avoid using shutdown -p but it seems a bit dodgy what its doing. If this machine where miles away without remote console it would have caused major amounts of pain. Steve ================================================ This e.mail is private and confidential between Multiplay (UK) Ltd. and the person or entity to whom it is addressed. In the event of misdirection, the recipient is prohibited from using, copying, printing or otherwise disseminating it or any information contained in it. In the event of misdirection, illegible or incomplete transmission please telephone (023) 8024 3137 or return the E.mail to postmaster@multiplay.co.uk.