From owner-freebsd-hackers Tue Mar 3 06:00:15 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id GAA11486 for freebsd-hackers-outgoing; Tue, 3 Mar 1998 06:00:15 -0800 (PST) (envelope-from owner-freebsd-hackers@FreeBSD.ORG) Received: from att.com (cagw1.att.com [192.128.52.89]) by hub.freebsd.org (8.8.8/8.8.8) with SMTP id FAA11345 for ; Tue, 3 Mar 1998 05:59:05 -0800 (PST) (envelope-from sbabkin@dcn.att.com) From: sbabkin@dcn.att.com Received: by cagw1.att.com; Tue Mar 3 08:52 EST 1998 Received: from dcn71.dcn.att.com (dcn71.dcn.att.com [135.44.192.112]) by caig1.att.att.com (AT&T/GW-1.0) with ESMTP id IAA29392 for ; Tue, 3 Mar 1998 08:58:59 -0500 (EST) Received: by dcn71.dcn.att.com with Internet Mail Service (5.0.1458.49) id ; Tue, 3 Mar 1998 09:01:15 -0500 Message-ID: To: tlambert@primenet.com Cc: shimon@simon-shapiro.org, wilko@yedi.iaf.nl, grog@lemis.com, jdn@acp.qiv.com, blkirk@float.eli.net, hackers@FreeBSD.ORG Subject: RE: SCSI Bus redundancy... Date: Tue, 3 Mar 1998 09:01:13 -0500 X-Priority: 3 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.0.1458.49) Content-Type: text/plain Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG > ---------- > From: Terry Lambert[SMTP:tlambert@primenet.com] > > > Huh ? Probably I've missed something about RAIDs. I've thought > > that, for example, RAID block 0 consists of blocks 0 of all > > the physical disks. And so on. And I've thought that RAID itself > > does not allocate any blocks, the upper level like filesystem or > > volume manager does it, RAID just makes chechsuming. Am I wrong > again ? > > If I allocate N stripes on M devices, I have N/M stripes per device. > > If I add a device, I do not automagically end up with N/(M+1) stripes > per device. I have to move some stripes around. > Absolutely agreed, and what I wrote was how this moving around can IMO be implemented. -SB To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message