Date: Wed, 2 Dec 2009 12:35:17 +0200 From: Marin Atanasov <dnaeon@gmail.com> To: freebsd-geom@freebsd.org Cc: freebsd-stable@freebsd.org Subject: FreeBSD 8.0: RAID-1 using gpart, gvinum and gmirror Message-ID: <717f7a3e0912020235g7d8f4a1ey65831a2bba6c637a@mail.gmail.com>
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Hello, I'm going to make my partition mirrored using the geom utilities, but however I've noticed that I cannot use the same way I used to do it under 7.2 and 8.0-RC1. Here's the situation - I tried a lot of times to make my root partition mirrored using gvinum, but each time when I boot in the new partition I'm unable to boot from it.. So instead of using gvinum for the root partition I've decided to use gmirror - and it works! I did it the following way - two NOT identical disks are added to the system. - 1 slices on the first disk - 2 slices on the second one (the 1st slice is the size of the root partition which is on the 1st slice on the 1st disk) Right after a fresh minimal install, I go to single-user mode and create the mirror: # gmirror label -vb round-robin gm0 /dev/ad0s1a Installing bootstap code on the second disk (in case I need to boot later from it): # fdisk -BI /dev/ad4s1 # bsdlabel -wB /dev/ad4s1 # newfs -O2 /dev/ad4s1 # newfs -O2 -U /dev/ad4s2 And then inserting the second component of the mirror: # gmirror insert gm0 /dev/ad4s1 And this is how I was doing a mirror for the root partition. For the other partitions - /usr, /var, /tmp, swap I used gvinum following a different articles, howtos and eventually it worked. The complete scenario of how I did the mirror for the other partitions is here (sorry, it's too long to just copy/paste it in the lists): http://www.daemonforums.org/showpost.php?p=27010&postcount=3 If I can say it with little words - the way mirroring works for the other partitions was to overlap all the other partitions with one big vinum partition. My problem now is that I cannot do this anymore, because I need to use gpart instead for creating the partitions, and using gpart I cannot create a vinum partition that will overlap the other partitions, so I cannot make any mirror for the other partitions. Is there any other way of doing this? I'm out of ideas now, perhaps you could help me out with this :) Thanks and regards, Marin -- Marin Atanasov Nikolov dnaeon AT gmail DOT com daemon AT unix-heaven DOT org
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