From owner-freebsd-fs@FreeBSD.ORG  Wed Apr 10 16:07:31 2013
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From: wolfgang@riegler.homeip.net
To: freebsd-fs@freebsd.org
Subject: Is it possible to use a zvol as log or cache device?
Date: Wed, 10 Apr 2013 18:00:37 +0200
Message-ID: <3766985.dKTvSZr3to@wolfgang>
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Hi,

is it possible to create a zvol on one zpool for using it as log or cache device on another zpool?


On my testsystem I have a zpool called "system" with a FreeBSD 9.1 installed and a second zpool called "test".
Trying to add the log device I get the following error:

# zfs create -V 128M system/zil
# zpool add test log /dev/zvol/system/zil
cannot add to 'test': one or more devices is currently unavailable


kind regards

Wolfgang