From owner-freebsd-hackers Sat Feb 28 14:14:06 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id OAA25502 for freebsd-hackers-outgoing; Sat, 28 Feb 1998 14:14:06 -0800 (PST) (envelope-from owner-freebsd-hackers@FreeBSD.ORG) Received: from sendero.simon-shapiro.org (sendero-fxp0.Simon-Shapiro.ORG [206.190.148.34]) by hub.freebsd.org (8.8.8/8.8.8) with SMTP id OAA25471 for ; Sat, 28 Feb 1998 14:13:30 -0800 (PST) (envelope-from shimon@sendero-fxp0.simon-shapiro.org) Received: (qmail 18951 invoked by uid 1000); 28 Feb 1998 22:21:35 -0000 Message-ID: X-Mailer: XFMail 1.3-alpha-021598 [p0] on FreeBSD X-Priority: 3 (Normal) Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 8bit MIME-Version: 1.0 In-Reply-To: Date: Sat, 28 Feb 1998 14:21:35 -0800 (PST) Reply-To: shimon@simon-shapiro.org Organization: The Simon Shapiro Foundation From: Simon Shapiro To: sbabkin@dcn.att.com Subject: RE: SCSI Bus redundancy... Cc: hackers@FreeBSD.ORG, blkirk@float.eli.net, jdn@acp.qiv.com, grog@lemis.com, wilko@yedi.iaf.nl Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On 28-Feb-98 sbabkin@dcn.att.com wrote: >> ---------- >> 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. Like I said; More than one way to skin a cat. I still prefer to have someone else do it for me (who is beter, etc.), but this is only me. We can always do all this in the O/S kernel... ---------- Sincerely Yours, Simon Shapiro Shimon@Simon-Shapiro.ORG Voice: 503.799.2313 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message