From owner-freebsd-questions Thu Apr 20 11:35:48 2000 Delivered-To: freebsd-questions@freebsd.org Received: from lark.capnet.state.tx.us (lark.capnet.state.tx.us [204.65.39.249]) by hub.freebsd.org (Postfix) with ESMTP id 8676B37BE6C; Thu, 20 Apr 2000 11:35:45 -0700 (PDT) (envelope-from Bryan.Bradsby@capnet.state.tx.us) Received: from localhost (bbradsby@localhost) by lark.capnet.state.tx.us (8.10.0/8.10.0) with ESMTP id e3KIYIM56053; Thu, 20 Apr 2000 13:34:18 -0500 (CDT) Date: Thu, 20 Apr 2000 13:34:18 -0500 (CDT) From: Bryan Bradsby To: Jin Guojun Cc: matrix@chat.ru, msmith@FreeBSD.ORG, questions@FreeBSD.ORG Subject: Re: IDE RAID (Adaptec one) In-Reply-To: <200004201817.LAA01940@george.lbl.gov> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG > I do not know Adaptec one, but I know 3ware has something similar. > We asked them for an evaluation board (retail is about $270) and come with > linux driver source. It works quite well under linux. It can be configured > as 2x2 stripe, 1x4 stripe (RAID1), and mirror (RAID0). The 2x2 stripe can > have 32MBps I/O rate which is not bad at all. If your goal is raw speed of disk I/O (not size), then don't overlook fast wide SCSI-2 Here is a snippet from dmesg. SCSI at 80 MBps using the standard ahc0 driver. da0: Fixed Direct Access SCSI-2 device da0: 80.000MB/s transfers (40.000MHz, offset 15, 16bit), Tagged Queueing Enabled Not IDE, or RAID, but fast and supported now. -bryan To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message