Date: Wed, 16 Aug 2006 13:37:43 +0200 From: Danny Carroll <danny@dannysplace.net> To: freebsd-geom@FreeBSD.org Subject: Mirror MBR? Message-ID: <44E30387.5000203@dannysplace.net>
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Hello all. I had a question about gmirror. I am using Ralf S Engelschall's mirroring solution at http://people.freebsd.org/~rse/mirror/ I used solution one, since I am sure that I will never be using any different disks. It's a pizzabox server, and I don't expect data growth so the current disks are fine. My main question is about the MBR. I dont see anywhere in the doc where I should put a new boot record on the disk after doing: dd if=/dev/zero of=/dev/ad0 bs=512 count=79 Does this mean that the MBR from the mirror gets put onto this first disk? I ask because, I need to know what should happen when I need to replace a disk. I know that after replacing the disk I should probably have to do something like this: (Assume ad0 is the new disk) gmirror configure -a gm0 gmirror insert gm0 /dev/ad1 But does that guarantee me that if ad0 fails, then I still have a bootable system (assuming bios knows to boot of ad1). Thanks for your time.
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