From owner-freebsd-geom@FreeBSD.ORG Sat May 5 14:21:13 2007 Return-Path: X-Original-To: freebsd-geom@freebsd.org Delivered-To: freebsd-geom@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 893F616A403 for ; Sat, 5 May 2007 14:21:13 +0000 (UTC) (envelope-from gcubfg-freebsd-geom@m.gmane.org) Received: from ciao.gmane.org (main.gmane.org [80.91.229.2]) by mx1.freebsd.org (Postfix) with ESMTP id 484E713C45A for ; Sat, 5 May 2007 14:21:13 +0000 (UTC) (envelope-from gcubfg-freebsd-geom@m.gmane.org) Received: from list by ciao.gmane.org with local (Exim 4.43) id 1HkL8C-000298-Oy for freebsd-geom@freebsd.org; Sat, 05 May 2007 16:21:04 +0200 Received: from cmung1765.cmu.carnet.hr ([193.198.134.241]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Sat, 05 May 2007 16:21:04 +0200 Received: from ivoras by cmung1765.cmu.carnet.hr with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Sat, 05 May 2007 16:21:04 +0200 X-Injected-Via-Gmane: http://gmane.org/ To: freebsd-geom@freebsd.org From: Ivan Voras Date: Sat, 05 May 2007 16:20:51 +0200 Lines: 8 Message-ID: References: <171980743.20070504223126@uzvik.kiev.ua> <125507.38194.qm@web30304.mail.mud.yahoo.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Complaints-To: usenet@sea.gmane.org X-Gmane-NNTP-Posting-Host: cmung1765.cmu.carnet.hr User-Agent: Thunderbird 1.5.0.10 (Windows/20070221) In-Reply-To: <125507.38194.qm@web30304.mail.mud.yahoo.com> X-Enigmail-Version: 0.94.1.0 Sender: news Subject: Re: graid5 after-reboot problem X-BeenThere: freebsd-geom@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: GEOM-specific discussions and implementations List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 05 May 2007 14:21:13 -0000 Arne Wörner wrote: > (that disables the write cache in graid5, which slows down write requests) Is the write cache in graid5 aware of what happens on the VFS / UFS layers (something like gjournal does)? Otherwise, how can you guarantee consistency with write caching at the GEOM layer when there's a power outage or some other system interruption?