From owner-freebsd-hardware Wed Oct 17 10:51:57 2001 Delivered-To: freebsd-hardware@freebsd.org Received: from great4.greatschools.net (great4.greatschools.net [199.4.104.154]) by hub.freebsd.org (Postfix) with ESMTP id 134E237B401 for ; Wed, 17 Oct 2001 10:51:56 -0700 (PDT) Received: from bronze.greatschools.net (bronze.greatschools.net [199.4.104.148]) by great4.greatschools.net (8.11.1/8.11.1) with ESMTP id f9HHpFs02830; Wed, 17 Oct 2001 10:51:15 -0700 (PDT) (envelope-from jdd@greatschools.net) Date: Wed, 17 Oct 2001 10:53:53 -0700 (PDT) From: John David Duncan To: Cc: Subject: Re: soft updates, write cache In-Reply-To: <20011017153516.62503.qmail@smx.pair.com> Message-ID: <20011017104044.Y5727-100000@bronze.greatschools.net> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-hardware@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org On Wed, 17 Oct 2001 carter@pair.com wrote: > Hello, > > I'm a bit unclear on the interactions of soft-updates and drive write cache. > I hear one should disable the write cache on IDE/ATA drives when using > soft-updates. Why? This is the second reference I've seen to this on this list, but there is no mention of it at www.mckusick.com or in the softupdates code... and there's not any immediately intuitive problem, either; scsi adapters and drives have long performed many levels of caching. - JD To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hardware" in the body of the message