zpool add log to root pool

[Olivier Smedts]

Hello ZFS folks,

Is there anyone here using a separate log device (or "ZIL") on a root pool ?

# zpool add tank log gpt/zil
cannot add to 'tank': root pool can not have multiple vdevs or separate logs

Under 9-STABLE, using zpool v28. This seems to be a limitation from
OpenSolaris. For example, FreeBSD supports booting from a
multiple-vdev root pool. I found that most people use the "unset
bootfs property, add vdev, set bootfs again" trick to have a working
multiple-vdev root pool under FreeBSD. I think I can do the same for
the log device but don't want to loose my data.

Is there anyone successfuly using a log device / zil on a root pool
under FreeBSD ?

Thanks

-- 
Olivier Smedts                                                 _
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