From owner-freebsd-current Tue Mar 18 6:34:37 2003 Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 445CB37B404; Tue, 18 Mar 2003 06:34:36 -0800 (PST) Received: from picard.skynet.be (picard.skynet.be [195.238.3.88]) by mx1.FreeBSD.org (Postfix) with ESMTP id B29DD43F85; Tue, 18 Mar 2003 06:34:30 -0800 (PST) (envelope-from brad.knowles@skynet.be) Received: from [10.0.1.2] (180.91-201-80.adsl.skynet.be [80.201.91.180]) by picard.skynet.be (8.12.8/8.12.8/Skynet-OUT-2.21) with ESMTP id h2IEYEEJ006892; Tue, 18 Mar 2003 15:34:14 +0100 (MET) (envelope-from ) Mime-Version: 1.0 X-Sender: bs663385@pop.skynet.be Message-Id: In-Reply-To: <3E76A151.320A1E12@mindspring.com> References: <20030317230147.I66343-100000@mail.chesapeake.net> <3E76A151.320A1E12@mindspring.com> Date: Tue, 18 Mar 2003 14:59:51 +0100 To: Terry Lambert From: Brad Knowles Subject: Re: Anyone working on fsck? Cc: Jeff Roberson , Brooks Davis , Julian Elischer , Alfred Perlstein , FreeBSD current users , fs@FreeBSD.ORG Content-Type: text/plain; charset="us-ascii" ; format="flowed" Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG At 8:32 PM -0800 2003/03/17, Terry Lambert wrote: > Even so, for RAID, this is generally problematic, because there's > multiple locations for the block: where it lives, where it's mirrored, > where it's parity block lives, etc.. Ideally, these are all different > spindles, so the problem can't be fixed by a simple cache. 8-(. It seems to me that there could be a logical cache which could be provided by the RAID code, which would sit above the physical block locations, the mirrors of the blocks, the parity data, etc.... Or is this the part that is provided by the filesystem? -- Brad Knowles, "They that can give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety." -Benjamin Franklin, Historical Review of Pennsylvania. GCS/IT d+(-) s:+(++)>: a C++(+++)$ UMBSHI++++$ P+>++ L+ !E-(---) W+++(--) N+ !w--- O- M++ V PS++(+++) PE- Y+(++) PGP>+++ t+(+++) 5++(+++) X++(+++) R+(+++) tv+(+++) b+(++++) DI+(++++) D+(++) G+(++++) e++>++++ h--- r---(+++)* z(+++) To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message