From owner-freebsd-scsi Sat Sep 28 14:33:38 1996 Return-Path: owner-freebsd-scsi Received: (from root@localhost) by freefall.freebsd.org (8.7.5/8.7.3) id OAA27774 for freebsd-scsi-outgoing; Sat, 28 Sep 1996 14:33:38 -0700 (PDT) Received: from smtp.utexas.edu (smtp.utexas.edu [128.83.126.2]) by freefall.freebsd.org (8.7.5/8.7.3) with SMTP id OAA27728 for ; Sat, 28 Sep 1996 14:33:32 -0700 (PDT) Received: (qmail-queue invoked by uid 0); 28 Sep 1996 21:33:30 -0000 Received: from unknown (HELO mail.utexas.edu) (128.83.126.1) by smtp.utexas.edu with SMTP; 28 Sep 1996 21:33:30 -0000 Received: from [208.2.87.4] (cod.dataplex.net [208.2.87.4]) by mail.utexas.edu (8.6.9/8.6.6) with SMTP id QAA32500; Sat, 28 Sep 1996 16:33:29 -0500 X-Sender: rkw@eel.dataplex.net Message-Id: Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Date: Sat, 28 Sep 1996 16:33:27 -0500 To: Peter Childs From: rkw@dataplex.net (Richard Wackerbarth) Subject: Re: striping/mirroring? Cc: freebsd-scsi@freebsd.org Sender: owner-freebsd-scsi@freebsd.org X-Loop: FreeBSD.org Precedence: bulk > I'm really quite interested in how you propose to have a mirrored > system where drives can run at different steeds. Mirror works like > this > > DATA ----> (going to disk) -------+--(and another copy)----+ > | | > disk 1 disk 2 > > So if i send some data to the (mirrored) disk, and disk1 > is significantly faster than disk2, then disk1 will finish the write > first.... so then do i just let it write more? No. However you can READ from disk1 while you wait for disk2 to finish. This may work particularly well in a case that most of the operations are reads. For example, a web server could be expected to have mostly reads with only a few writes.