From owner-freebsd-questions@FreeBSD.ORG Tue Oct 14 08:48:57 2003 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id A15B216A4B3 for ; Tue, 14 Oct 2003 08:48:57 -0700 (PDT) Received: from sparqnet.net (tan1.sparqnet.net [211.78.130.20]) by mx1.FreeBSD.org (Postfix) with SMTP id 16A8C43F93 for ; Tue, 14 Oct 2003 08:48:56 -0700 (PDT) (envelope-from kclee@tiny.ws) Received: from kclee([61.66.184.186]) by sparqnet.net(AIMC 2.9.5.4) with SMTP id jm363f8c6857; Tue, 14 Oct 2003 23:48:36 +0800 Message-ID: <001601c3926a$a2d124f0$6401a8c0@kclee> From: "Michael Lee" To: , "Kirk Strauser" References: <000b01c39237$c52f8bf0$6401a8c0@kclee> <87ekxfsybe.fsf@strauser.com> Date: Tue, 14 Oct 2003 23:48:37 +0800 MIME-Version: 1.0 Content-Type: text/plain; charset="Windows-1252" Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1158 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 Subject: Re: Hardware RAID vs softupdates X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 14 Oct 2003 15:48:57 -0000 X-List-Received-Date: Tue, 14 Oct 2003 15:48:57 -0000 Hi Kirk, Thank you for your reply but I think that you probably misunderstand me. So far as I know, FFS with softupdates support acts quite similar to async. file system. However, hardware based RAID controller card is usually equipped with some cache RAM. In some aspects, RAID controller card acts somewhat like async. file ssytem. I wonder if RAID controller waits for a certain time before it does command "write" to disk and then this "write" command then was queued by softupdates.... Will it be faster if I use softupdates with hardware RAID system ? Thanks! Michael Lee ----- Original Message ----- From: "Kirk Strauser" To: Sent: Tuesday, October 14, 2003 10:12 PM Subject: Re: Hardware RAID vs softupdates At 2003-10-14T09:44:31Z, "Michael Lee" writes: > I have 4 SCSI hdds connect to this controller card. I wonder if I should > disable the softupdates feature for the FFS to make the system runs > faster. Out of curiosity, what part of the system do you think would be faster without softupdates? -- Kirk Strauser "94 outdated ports on the box, 94 outdated ports. Portupgrade one, an hour 'til done, 82 outdated ports on the box."