From owner-freebsd-questions@FreeBSD.ORG Tue Oct 28 08:42:21 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 06EDB16A4CE for ; Tue, 28 Oct 2003 08:42:21 -0800 (PST) Received: from smtpout.mac.com (A17-250-248-87.apple.com [17.250.248.87]) by mx1.FreeBSD.org (Postfix) with ESMTP id 4EC1F43FF3 for ; Tue, 28 Oct 2003 08:42:20 -0800 (PST) (envelope-from cswiger@mac.com) Received: from mac.com (smtpin07-en2 [10.13.10.152]) by smtpout.mac.com (Xserve/MantshX 2.0) with ESMTP id h9SGgJ9H007246; Tue, 28 Oct 2003 08:42:19 -0800 (PST) Received: from mac.com (dpvc-68-161-244-25.ny325.east.verizon.net [68.161.244.25]) (authenticated bits=0)h9SGgICQ002166; Tue, 28 Oct 2003 08:42:18 -0800 (PST) Date: Tue, 28 Oct 2003 11:42:17 -0500 Content-Type: text/plain; charset=US-ASCII; format=flowed Mime-Version: 1.0 (Apple Message framework v552) To: Joe Pokupec From: Charles Swiger In-Reply-To: <005301c39d29$291b70b0$7807a8c0@JOETABLET> Message-Id: Content-Transfer-Encoding: 7bit X-Mailer: Apple Mail (2.552) cc: Freebsd-Questions Subject: Re: RAID 0 After the install? 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, 28 Oct 2003 16:42:21 -0000 On Tuesday, October 28, 2003, at 02:57 AM, Joe Pokupec wrote: > - If I use a hardware ATA RAID card, are there certain system settings > required for FreeBSD to recognize this, or is the RAID format done at a > platform-independent level (BIOS or other boot utilities)? It depends. Some have a OS-level driver or utility (perhaps one that runs under Linux emulation), others work via the BIOS. > - If one of the 2 hard drives fail, the data will still be visible and > accessible on the remaining drive correct? No. RAID-0 provides no redundancy; use RAID-1 mirroring instead. > How easy is it to replace the > failed drive? Will the data from the good drive automatically copy > over to > the newly replaced drive or are there a lot of shenanigans involved? This also depends. Generally, you have to kick of a mirror rebuild via the BIOS, but some hardware is smarter about this than other hardware. > - Is it possible to stripe only 1 drive as RAID 0 with the intention of > dropping in another drive later? Yes, but doing so isn't useful: the end result is a concatenation rather than a true RAID-0 stripe, and you don't gain any performance advantages. -- -Chuck