Method to mirror a single partition across the net.
sgk at troutmask.apl.washington.edu
Wed Nov 5 13:36:11 PST 2008
On Wed, Nov 05, 2008 at 10:01:24PM +0100, Wojciech Puchar wrote:
> >following issue.
> >I would like to mirror a single partition on system A to a
> >a partition on system B. It would appear a combination of
> >gmirror and ggated would work, but I haven't found any
> >example on setting up two systems.
> you are right.
> just create device with ggatec and insert it to the mirror.
Thanks for the reply. Perhaps, I'm missing an important detail,
but gmirror(8) seems to suggest that it operates on an entire
disk. Note, in my original email I used the word partition
but showed a disk slice. I really do mean a partition within
a slice. Does the following work where I want to mirror only
192.168.0.20:/dev/ad4s1e to 192.168.0.21:/dev/ad4s1e?
# umount /dev/ad4s1e
# echo "192.168.0.21/24 RW /dev/ad4s1e" > /etc/gg.exports
# ggatec create -o rw 192.168.0.21 /dev/ad4s1e
# gmirror label data /dev/ad4s1e
# gmirror insert data /dev/ggate0
and /etc/fstab becomes
# Device Mountpoint FStype Options Dump Pass#
/dev/ad4s1b none swap sw 0 0
/dev/ad4s1a / ufs rw 1 1
/dev/ad4s1d /usr ufs rw 2 2
/dev/mirror/data /data ufs rw 2 2
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