Date: Tue, 7 Jan 2003 18:21:53 +0100 (CET) From: Soeren Schmidt <sos@spider.deepcore.dk> To: eculp@encontacto.net Cc: "current@FreeBSD.ORG" <current@FreeBSD.ORG> Subject: Re: mirrored root fs? Message-ID: <200301071721.h07HLskV071635@spider.deepcore.dk> In-Reply-To: <1041959619.3e1b0ac3deac9@Mail.EnContacto.Net>
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It seems eculp@encontacto.net wrote: > | man atacontrol :) > > I did that but it sounded too easy :) It actually is :) > | However if you want to use RAID1+0 and you want to be able to > | boot from it you *need* a RAID capable controller BIOS, there is > | no way to make a stock BIOS boot from a RAID0... > | If you need it on install you probably also need at RAID capable > | controller, if you define the RAID BIOS there, it will show up > | in sysinstall.. > > The solution that pops into my mind is to have a small ad0 for boot > and / partition. and ad1,ad2,ad3 as raid0+1 or ad1 and 2 as raid1 > raid1 should solve my problem. Would either of these be configurable > on sysinstall to have the /var and /usr partitions on the raid disks? > If not that should be easy enough after a minimal install and reboot > on ad0. You need 4 disks for RAID0+1, and if you want to see the RAID's in sysinstall you need to have them created first, either by having a "real" ATA RAID controller, or having made it beforehand on the disks in possibly another machine or from a minimal install. Once the RAID's has been setup, sysinstall will pick them up.. (Maybe one can boot the fixit thingy and run atacontrol from the live filesystem, havn't tried)... > | No, the RAID part of the ATA driver has nothing to do with vinum. > | Vinum has several limitations that make it useless in this context. > | Mainly that the RAID config layout on disk need to be of different > | formats depending on what controller BIOS we have, and there is no > | place to put all the extra volume stuff that vinum needs. > | The ATA RAID code is very generic instead, with backends that converts > | the internal RAID info to/from the needed info on disk depending > | on controller type. > > Thanks for the clarification, Søren. Please forgive my basic, uninitiated > questions. I really should probably have been paying more attention as > these features were being added. No problem, feel free to ask, we add so many features to FreeBSD all the time it can be hard to follow them all... -Søren To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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