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Date:      Fri, 17 Sep 2010 10:13:52 -0500
From:      Bryan Drewery <bryan@shatow.net>
To:        gil@vidals.net
Cc:        freebsd-fs@freebsd.org
Subject:   Re: what happens to pool if ZIL dies on ZFS v14
Message-ID:  <4C9385B0.2080909@shatow.net>
In-Reply-To: <AANLkTi=vYVG300nhMjkcLju=kQhBdPJDqyaXR0mG84%2Bp@mail.gmail.com>
References:  <AANLkTi=vYVG300nhMjkcLju=kQhBdPJDqyaXR0mG84%2Bp@mail.gmail.com>

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Gil Vidals wrote:
> I read a forum post claiming that FreeBSD's ZFS v13 will not continue to
> function normally when the dedicated ZIL devices dies or goes away.
> Apparently the Solaris version of ZFS does support losing the ZIL. So can
> somebody confirm what happens in FreeBSD 8.1 (ZFS v14)?
>
>   
Yes that is correct. You should mirror your log devices to avoid problems.

zfs v19 allows removing log devices - so mirroring will not be necessary 
after that point.
opensolaris$ zpool upgrade -v|grep Log
 19  Log device removal


Bryan



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