From owner-freebsd-hackers Sat Feb 28 10:08:46 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id KAA01061 for freebsd-hackers-outgoing; Sat, 28 Feb 1998 10:08:46 -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 KAA01056 for ; Sat, 28 Feb 1998 10:08:37 -0800 (PST) (envelope-from sbabkin@dcn.att.com) From: sbabkin@dcn.att.com Received: by cagw1.att.com; Sat Feb 28 13:01 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 NAA09118 for ; Sat, 28 Feb 1998 13:08:33 -0500 (EST) Received: by dcn71.dcn.att.com with Internet Mail Service (5.0.1458.49) id ; Sat, 28 Feb 1998 13:10:46 -0500 Message-ID: To: shimon@simon-shapiro.org, wilko@yedi.iaf.nl, grog@lemis.com Cc: jdn@acp.qiv.com, blkirk@float.eli.net, hackers@FreeBSD.ORG Subject: RE: SCSI Bus redundancy... Date: Sat, 28 Feb 1998 13:10:44 -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: Greg Lehey[SMTP:grog@lemis.com] > > > I think Julian's SLICE code has something in that direction. DPT > > supports INCREASING the size of a RAID-5 array by adding drives. > > How can that work? > Something like - read N RAID blocks from K disks - compute new checksum for K+1 disks and write as less number of RAID blocks but each one of bigger size (K+1/K times) - add empty blocks at the end of RAID in the added space What am I wondering is why nobody did that before ? It's so boring to rebuild the whole RAID if all you want is to add or remove a disk. -SB To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message