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
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, > HansI 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
Hans F. Nordhaug on 2005-06-04 00:26:20 +0200:> 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.Just as fair warning, you should not rely on RAID as a 'backup' like you would rely on writing to removable media and storing off-site. If someone cracks your computer and you want to go back to known good snapshot, you're out of luck; if you accidently overwrite something, RAID won't help you.> I'm running 5.3 - what do you recommend - gvinum, ccd, others? What > is the definitive howto for the recommend solution.You should use gmirror. There's an excellent guide - http://people.freebsd.org/~rse/mirror/. I've been using gmirror for about half a year and have had no problems. -------------- next part -------------- A non-text attachment was scrubbed... Name: not available Type: application/pgp-signature Size: 187 bytes Desc: not available Url : http://lists.freebsd.org/pipermail/freebsd-stable/attachments/20050603/44545bc1/attachment.bin