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Date:      Thu, 29 Aug 2013 17:38:06 -0400
From:      Charles Sprickman <spork@bway.net>
To:        Andriy Gapon <avg@freebsd.org>
Cc:        freebsd-fs@FreeBSD.org, freebsd-stable@FreeBSD.org
Subject:   Re: Boot problem if a ZFS log device is missing
Message-ID:  <CC82FB9B-0676-4391-A494-9B5C388C80B8@bway.net>
In-Reply-To: <521F0DEB.20408@FreeBSD.org>
References:  <521F05F0.4090607@cloverinformatica.it> <521F0DEB.20408@FreeBSD.org>

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On Aug 29, 2013, at 5:01 AM, Andriy Gapon wrote:

> on 29/08/2013 11:27 Maurizio Vairani said the following:
>>=20
>> I am able to boot the PC without a cache device but not without a log =
device. Why ?
>=20
> The log could potentially contain uncommitted entries.  Without the =
log device
> there is no knowing if it did or did not.  And if it did then the pool =
is
> inconsistent state without the log device and so it can not be =
imported.

If one is willing to accept that data is lost (like the log device is =
totally smoked), is there a way to boot knowing that you may have some =
data loss, or is the only option to boot alternate media and force a =
pool import (assuming that works without the log device)?

Charles

>=20
> The cache is not persistent and so there is nothing needed from it =
upon a boot.
>=20
> --=20
> Andriy Gapon
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