From owner-freebsd-scsi Tue Feb 17 12:06:58 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id MAA09489 for freebsd-scsi-outgoing; Tue, 17 Feb 1998 12:06:58 -0800 (PST) (envelope-from owner-freebsd-scsi@FreeBSD.ORG) Received: from clifford.inch.com (omar@clifford.inch.com [207.240.140.163]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id MAA09442 for ; Tue, 17 Feb 1998 12:06:48 -0800 (PST) (envelope-from omar@clifford.inch.com) Received: (from omar@localhost) by clifford.inch.com (8.8.5/8.8.5) id PAA17552; Tue, 17 Feb 1998 15:01:36 -0500 Message-ID: <19980217150134.49019@clifford.inch.com> Date: Tue, 17 Feb 1998 15:01:34 -0500 From: Omar Thameen To: freebsd-scsi@FreeBSD.ORG Subject: getting oriented with RAID Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 0.81 Sender: owner-freebsd-scsi@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org Hi, With DPT's single channel RAID controllers being priced at under $800 retail, we're looking into adding it to several of our systems. I've been reading in the archives and on Simon's website http://simon-shapiro.org), but there are some basic things I'm still not clear on that I'm hoping y'all could explain. 1) From the DPT website, their PM2044UR (single channel PCI) RAID controller supports RAID 0, 1, 5, 0+1, and 0+5. Does this necessarily mean that the FreeBSD driver written by Simon can also do all of the above? Something I read in the archives indicated that you need do use ccd for RAID0. 2) Do the FreeBSD drivers support the PM2044UR card, or do you have to use the higher-end, multi-channel product? 3) Given that you want redundancy and optimal performance, can you increase performance by running RAID0+1, or is it better to just run RAID1? Thanks, Omar To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message