From owner-freebsd-questions Thu Mar 7 1:58: 2 2002 Delivered-To: freebsd-questions@freebsd.org Received: from klima.physik.uni-mainz.de (klima.Physik.Uni-Mainz.DE [134.93.180.162]) by hub.freebsd.org (Postfix) with ESMTP id F147337B400 for ; Thu, 7 Mar 2002 01:57:56 -0800 (PST) Received: from klima.Physik.Uni-Mainz.DE (Sturm@klima.Physik.Uni-Mainz.DE [134.93.180.162]) by klima.physik.uni-mainz.de (8.11.6/8.11.6) with ESMTP id g279vtR69419 for ; Thu, 7 Mar 2002 10:57:55 +0100 (CET) (envelope-from ohartman@klima.physik.uni-mainz.de) Date: Thu, 7 Mar 2002 10:57:55 +0100 (CET) From: "Hartmann, O." To: freebsd-questions@freebsd.org Subject: mount option 'ASYNC' on UFS filesystems? Message-ID: <20020307105340.J44879-100000@klima.physik.uni-mainz.de> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG Dear Sirs. It is said that it could be very dangerous enabling the option 'async' in /etc/fstab on each mounted UFS filesystem. I can follow this warning so far as I'm on a normal IDE/SCSI type device, but what's about a RAID 5? I wish to enable this option on several server based file systems located on a RAID 5 controller (AMI Enterprise 1600 RAID, battery backed up cache memory). Due to the fact that the controller uses a battery backed up cache likelyhood of crash and data loss seems to be small, but just in case all buffers are written to the controller's memory and there are no remains in the system memory space. Can anyone give some hints, tips or comments about that? Thanks in advance, Oliver -- MfG O. Hartmann ohartman@klima.physik.uni-mainz.de ------------------------------------------------------------------ IT-Administration des Institutes fuer Physik der Atmosphaere (IPA) ------------------------------------------------------------------ Johannes Gutenberg Universitaet Mainz Becherweg 21 55099 Mainz Tel: +496131/3924662 (Maschinenraum) Tel: +496131/3924144 (Buero) FAX: +496131/3923532 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message