Date: Fri, 3 Jun 2005 17:31:21 -0500 From: Karl Denninger <karl@denninger.net> To: freebsd-stable@freebsd.org Subject: Re: RAID-1 as back-up Message-ID: <20050603223121.GA60631@FS.denninger.net> In-Reply-To: <20050603222620.GA708@hiMolde.no> References: <20050603222620.GA708@hiMolde.no>
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On Sat, Jun 04, 2005 at 12:26:20AM +0200, Hans F. Nordhaug wrote: > Dear list, > > I would like to use RAID-1 as a back-up solution. If one of the disk > breaks I would like my server to continue to run from the other disk. > I have followed the mailing list for a while and read some howtos, > but I'm not sure if this is possible (without doing all kinds of tricks > when the accidents happens - removing meta data and so on). In > addition, I thought, gvinum was the way to go, but hasn't there been > some problems with it (reported here lately)? I'm running 5.3 - what > do you recommend - gvinum, ccd, others? What is the definitive howto for > the recommend solution. Thx for your time. > > Regards, > Hans I do this using gmirror; I run a two-disk Raid1 system for normal operaton, and back up to a third device which a CRON job attaches and detaches nightly to image the system. The detached disk is removed, so it will not be detected as a valid device on boot. If the online mirror breaks (either disk) the other continues on its merry way. In a catastrophe where the system scribbles on BOTH disks, the other volume can be booted manually and with a bit of effort (couple of command-line entries from single user mode) brought online as a single device. -- -- Karl Denninger (karl@denninger.net) Internet Consultant & Kids Rights Activist http://www.denninger.net My home on the net - links to everything I do! http://scubaforum.org Your UNCENSORED place to talk about DIVING! http://www.spamcuda.net SPAM FREE mailboxes - FREE FOR A LIMITED TIME! http://genesis3.blogspot.com Musings Of A Sentient Mind
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