Mirror MBR?
Danny Carroll
danny at dannysplace.net
Wed Aug 16 11:37:47 UTC 2006
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.
More information about the freebsd-geom
mailing list