Laszlo,

You're making gmirror way too difficult.  In short, install FreeBSD with
however many partitions you want, then install gmirror and replicate
your disk to the second disk.

The standard howto documents are:

http://dannyman.toldme.com/2005/01/24/freebsd-howto-gmirror-system/

http://www.onlamp.com/pub/a/bsd/2005/11/10/FreeBSD_Basics.html

http://people.freebsd.org/~rse/mirror/

I've used Danny's and Ralf's (the first and third).  Danny's is simpler,
but Ralf's has the advantage that it can be done remotely.  Danny's
website now recommends Dru's (the second).  You may want to try that
first.

Let us know how it goes,
I tried the second link, as you suggested. It does not work for me. I have to identical disks on /dev/ad10 and /dev/ad8. I have installed FreeBSD on /dev/ad10 and I initialized gmirror on that disk. Here is what df says:

backupserver# df -h
Filesystem Size Used Avail Capacity Mounted on
/dev/mirror/gm0s1a 4.8G 34M 4.4G 1% /
devfs 1.0K 1.0K 0B 100% /dev
/dev/mirror/gm0s1e 9.7G 12K 8.9G 0% /tmp
/dev/mirror/gm0s1f 115G 261M 106G 0% /usr
/dev/mirror/gm0s1d 9.7G 232K 8.9G 0% /var
backupserver# swapinfo
Device 1K-blocks Used Avail Capacity
/dev/mirror/gm0s1b 5242880 0 5242880 0%
backupserver#


Then I try to add the ad8 device:

backupserver# gmirror insert gm0 /dev/ad8
Provider ad8 too small.
backupserver#

But of course this is not true. ad8 and ad10 are identical 160GB SATA disks.
What am I doing wrong? Please help.

Laszlo

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