From owner-freebsd-current Mon Dec 10 10:13:24 2001 Delivered-To: freebsd-current@freebsd.org Received: from apollo.backplane.com (apollo.backplane.com [216.240.41.2]) by hub.freebsd.org (Postfix) with ESMTP id B959737B417; Mon, 10 Dec 2001 10:13:20 -0800 (PST) Received: (from dillon@localhost) by apollo.backplane.com (8.11.6/8.9.1) id fBAIDKo47460; Mon, 10 Dec 2001 10:13:20 -0800 (PST) (envelope-from dillon) Date: Mon, 10 Dec 2001 10:13:20 -0800 (PST) From: Matthew Dillon Message-Id: <200112101813.fBAIDKo47460@apollo.backplane.com> To: Mike Smith Cc: Terry Lambert , Joerg Wunsch , freebsd-current@FreeBSD.ORG Subject: Re: cvs commit: src/sys/kern subr_diskmbr.c References: <200112101754.fBAHsRV01202@mass.dis.org> Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG :Spindle sync is an anachronism these days; asynchronous behaviour :(write-behind in particular) is all the rage. You'd be hard-pressed to :find drives that even support it anymore. Woa! Say what? I think you are totally incorrect here Mike. Spindle sync is not an anachronism. You can't get good RAID{0,2,3,4,5} performance without it - for reading OR writing. It doesn't matter so much for RAID{1,10}, but it matters a whole lot for something like RAID-5 where the difference between a spindle-synced read or write and a non-spindle-synched read or write can be upwards of 35%. -Matt Matthew Dillon To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message