From owner-freebsd-questions Wed Mar 7 12:24:12 2001 Delivered-To: freebsd-questions@freebsd.org Received: from empty1.ekahuna.com (empty1.ekahuna.com [205.178.102.196]) by hub.freebsd.org (Postfix) with ESMTP id 2A66437B71A for ; Wed, 7 Mar 2001 12:24:08 -0800 (PST) (envelope-from pjklist@ekahuna.com) Received: from pc-02 (pc02.ekahuna.com [205.178.102.197]) by empty1.ekahuna.com (Post.Office MTA v3.5.3 release 223 ID# 0-0U10L2S100V35) with ESMTP id com for ; Wed, 7 Mar 2001 12:24:07 -0800 From: "Philip J. Koenig" Organization: The Electric Kahuna Organization To: questions@FreeBSD.ORG Date: Wed, 7 Mar 2001 12:24:06 -0800 MIME-Version: 1.0 Content-type: text/plain; charset=US-ASCII Content-transfer-encoding: 7BIT Subject: SoftUpdates/hardware write cache Reply-To: pjklist@ekahuna.com Message-ID: <3AA62866.19173.6F378F@localhost> X-mailer: Pegasus Mail for Win32 (v3.12c) Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG I recently upgraded a SCSI disk on a 4.2-Stable box. Apparently the new drive has the internal write cache turned off by default. I'm about to enable SoftUpdates with the tunefs thing and I was wondering if I should also enable the disk's internal write cache. My experience in the past with other OS's says it can make a big performance improvement. This machine runs on a large UPS so power-loss isn't a big issue. I know there is some Unix program that can at least read mode pages, I'm hoping it can set them too. My DOS program won't work on this hardware and I'd hate to have to stick the drive on a Windows machine to set that setting. :-) TIA, Phil -- Philip J. Koenig pjklist@ekahuna.com Electric Kahuna Systems -- Computers & Communications for the New Millenium To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message