From owner-freebsd-hackers Sun Nov 5 13:46:00 1995 Return-Path: owner-hackers Received: (from root@localhost) by freefall.freebsd.org (8.6.12/8.6.6) id NAA15971 for hackers-outgoing; Sun, 5 Nov 1995 13:46:00 -0800 Received: from ki1.chemie.fu-berlin.de (ki1.Chemie.FU-Berlin.DE [160.45.24.21]) by freefall.freebsd.org (8.6.12/8.6.6) with SMTP id NAA15960 for ; Sun, 5 Nov 1995 13:45:54 -0800 Received: by ki1.chemie.fu-berlin.de (Smail3.1.28.1) from sirius.physik.fu-berlin.de (130.133.3.140) with smtp id ; Sun, 5 Nov 95 22:45 MET Received: by sirius.physik.fu-berlin.de; id AA24092; Sun, 5 Nov 1995 22:45:34 +0100 From: Thomas Graichen Message-Id: <9511052145.AA24092@sirius.physik.fu-berlin.de> Subject: ideas from netbsd To: hackers@freebsd.org Date: Sun, 5 Nov 1995 22:45:34 +0100 (MET) X-Mailer: ELM [version 2.4 PL23] Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Content-Length: 2249 Sender: owner-hackers@freebsd.org Precedence: bulk hello (part 2) i looked a bit into NetBSD and it's sources and got the following ideas: * one thing that looks very intersting is the ccd-driver (concatenated disk driver) - using this driver it is possible to realize disk-striping over multiple disks - serial (one after the other) or interleaved - it is configured into the kernel as a pseudo-device and then you may put together your striped disk(s) using the command ccdcontrol together with an optional /etc/ccd.conf - i think disk-striping is something wich is currently missing in FreeBSD - i looked a bit more into it and tried to adapt it to FreeBSD but it's my first try to do something deep in the kernel and thus i need someone who helps me - is there anybody interested ? - i've a test-machie here (2 identical 85 mbyte ide disks ready to be concatenated) - and i'm willing to help as much as i can (and to learn something more this way) * another thing is the COMPAT_FREEBSD option (... and code) - i think it would be a good idea to have something similar for NetBSD (COMPAT_NETBSD) in FreeBSD - i think it should be relatively easy to add (maybe i'm wrong) - if NetBSD 1.1 comes out (it's announced for november the 17th) i'll try how good it is and tell you more about it (the same for the ccd-driver) * i don't know how far the linux-emu currently is (i'll start CTM'ing -current in the next days) but i think it only works with linux-aout - but linux now is moving to linux-elf - and if i remember right - the NetBSD version of the linux-compat stuff also supports elf - maybe worth looking (but i think the one(s) who is (are) working on the linux-emu has done it ...) that's all for now - just some ideas - please let me know what you think about them t _______________________________________________________||_____________________ __|| Perfection is reached, not when there is no __|| thomas graichen longer anything to add, but when there __|| freie universitaet berlin is no longer anything to take away __|| fachbereich physik __|| - Antoine de Saint-Exupery - __|| ___________________________||____email: graichen@omega.physik.fu-berlin.de____