From owner-freebsd-geom@FreeBSD.ORG Fri Nov 9 14:28:20 2007 Return-Path: Delivered-To: freebsd-geom@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 1C47516A41A for ; Fri, 9 Nov 2007 14:28:20 +0000 (UTC) (envelope-from toomas.aas@raad.tartu.ee) Received: from kuller.raad.tartu.ee (kuller.raad.tartu.ee [194.126.106.100]) by mx1.freebsd.org (Postfix) with ESMTP id B81BC13C4B3 for ; Fri, 9 Nov 2007 14:28:19 +0000 (UTC) (envelope-from toomas.aas@raad.tartu.ee) Received: from localhost (localhost [127.0.0.1]) by kuller.raad.tartu.ee (Postfix) with ESMTP id DB884BAE6 for ; Fri, 9 Nov 2007 16:08:43 +0200 (EET) X-Virus-Scanned: amavisd-new at post.raad.tartu.ee Received: from kuller.raad.tartu.ee ([127.0.0.1]) by localhost (kuller.raad.tartu.ee [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 1Wm+opDIY3HP for ; Fri, 9 Nov 2007 16:08:41 +0200 (EET) Received: from raad.tartu.ee (lv.raad.tartu.ee [194.126.106.110]) by kuller.raad.tartu.ee (Postfix) with ESMTP id B6C85B8CB for ; Fri, 9 Nov 2007 16:08:41 +0200 (EET) Received: from INFO/SpoolDir by raad.tartu.ee (Mercury 1.48); 9 Nov 07 16:08:41 +0200 Received: from SpoolDir by INFO (Mercury 1.48); 9 Nov 07 16:08:35 +0200 Received: from [172.26.1.6] (172.26.1.6) by raad.tartu.ee (Mercury 1.48) with ESMTP; 9 Nov 07 16:08:28 +0200 Message-ID: <473469DC.3040305@raad.tartu.ee> Date: Fri, 09 Nov 2007 16:08:28 +0200 From: Toomas Aas User-Agent: Thunderbird 2.0.0.6 (Windows/20070728) MIME-Version: 1.0 To: freebsd-geom@freebsd.org Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Subject: BIO_FLUSH and BBWC 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: Fri, 09 Nov 2007 14:28:20 -0000 Hello! Using FreeBSD 7.0-BETA2 I created some UFS+gjournal filesystems on IBM ServeRAID 8k (aac) controller. When the filesystem is being mounted, I get this message: GEOM_JOURNAL: BIO_FLUSH not supported by aacd1s2 OK, so aac driver doesn't support BIO_FLUSH. Is my understanding correct that BIO_FLUSH is the request that tells the controller to flush its cache, or is it about flushing some other cache? If it is controller cache that can't be flushed, then am I correct in thinking that if my controller has battery-backed cache then this is actually not a major concern? Another message that I don't understand which happens when mounting the FS is this: WARNING: Expected rawoffset 0, found 514080 -- Toomas Aas