On Jul 6, 2011, at 10:08 PM, Volodymyr Kostyrko wrote:

> 1. Check that pools have up-to-date boot code.

I tried 8.2 and HEAD. You mean gpart+gptzfsboot+pmbr, right?

> 2. Try to convince bios to boot from the disk of pool2.

There is no disk with a singular ZFS pool.

> 3. You can possibly try deploying /boot/boot0 MBR selector code over disks of 
> data pool. Supplied boot0 code can be used to choose another disk to jump to 
> it during boot process and will remember the last choice.

I'm not really sure how to do this with GPT. Should I use boot0 instead of pmbr?

However, this 
(http://freebsd.1045724.n5.nabble.com/Booting-from-ZFS-raidz-td4032461.html) 
may be related to the problem:

> You can boot from any of the drives and as long as the BIOS can see   
> enough drives you should be able to boot.

In my case, the BIOS certainly can not see all members of the raid-z pool. The 
question is: why does it want to boot from raid-z at all, and how could it be 
persuaded to use the mirrored pool instead?

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