From owner-freebsd-current Mon Dec 10 10:58:49 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 1F29537B41B; Mon, 10 Dec 2001 10:58:44 -0800 (PST) Received: (from dillon@localhost) by apollo.backplane.com (8.11.6/8.9.1) id fBAIwiX48022; Mon, 10 Dec 2001 10:58:44 -0800 (PST) (envelope-from dillon) Date: Mon, 10 Dec 2001 10:58:44 -0800 (PST) From: Matthew Dillon Message-Id: <200112101858.fBAIwiX48022@apollo.backplane.com> To: Mike Smith Cc: freebsd-current@FreeBSD.ORG Subject: Re: cvs commit: src/sys/kern subr_diskmbr.c References: <200112101901.fBAJ1hV01951@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 :> Well, for reads a non-stripe-crossing op would still work reasonably :> well. But for writes less then full-stripe operations without :> spindle sync are going to be terrible due to the read-before-write :> requirement (to calculate parity). The disk cache is useless in that :> case. : :You obviously weren't reading the previous thread on RAID5 checksum :calculation, I see. 8) I don't see a thread on raid-5 checksuming. What was the subject? -Matt To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message