ZFS: root mirror

This is a simple Tutorial how you can create a bootable ZFS Root Mirror with Opensolaris. I had some help from both Opensolaris-Forums (com/org) and this Blog from Malachi.

And here we go with the Tutorial:

Making a bootable ZFS Root Mirror

1. Install Opensolaris to Disk A (c3d0s0).

2. Format Disk B (c3d1s0) properly:

   host:# format
   (choose fdisk)
   (create 100% Standard Solaris Partition over the full Disk)

3. Overwrite the Diskformat properly:

   host:# prtvtoc /dev/rdsk/c3d0s2 | fmthard -s - /dev/rdsk/c3d1s2

(NOTE: s2! on BOTH Disks)

4. Attach Disk B to the ZFS Root Pool:

   host:# zpool attach -f rpool c3d0s0 c3d1s0

5. Install the GRUB-Stuff to Disk B:

   host:# installgrub -m /boot/grub/stage1 /boot/grub/stage2 /dev/rdsk/c3d1s0

6. Test the worst Case: Disk A fails, you can still boot into Disk B

• Remove Disk A
• Replace it with an emtpy Disk C
• Start the System: Choose to boot from Disk B in the Bios
• Repeat Steps 2. till 5. for Disk C (swap c3d0s0 and c3d1s0)
• Start the System like before (from Disk C)

Fuente: http://darkstar-solaris.blogspot.com/2008/09/zfs-root-mirror.html