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Date:      Thu, 26 May 2011 09:30:15 -0700
From:      Nick Sayer <nsayer@kfu.com>
To:        Andriy Gapon <avg@FreeBSD.org>
Cc:        "freebsd-fs@FreeBSD.org" <freebsd-fs@FreeBSD.org>
Subject:   Re: kern/153804: boot from zfs kernel.old recovery undocumented/impossible
Message-ID:  <6CEE2015-A88C-4C2E-9CE0-3FF154A7E5A5@kfu.com>
In-Reply-To: <4DDE7EEC.5000708@FreeBSD.org>
References:  <201105261440.p4QEe9Rd011893@freefall.freebsd.org> <4DDE6FAE.9070601@FreeBSD.org> <C04E9E54-BEB9-4EE4-A32A-68E1530B3F04@kfu.com> <4DDE7EEC.5000708@FreeBSD.org>

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On May 26, 2011, at 9:25 AM, Andriy Gapon wrote:

> on 26/05/2011 19:14 Nick Sayer said the following:
>> 1. Man pages are not helpful when the system will not boot.
>=20
> Yeah, if you have only a single system.  Non-hardcopy =
Handbook/Wiki/etc won't help
> you either.
>=20
>> 2. The page in question does not mention the correct type argument =
for the
>> zpool.cache (nor that the type is not material). Not that it =
necessarily
>> should, but in either case, loader(8) is not sufficient.
>=20
> Why should it?

Did you not read the last sentence there, sparky?

>=20
>> 3. Perhaps it would be particularly helpful to print some kind of =
message as to
>> WHY the system failed to mount root - that the zpool.cache file =
wasn't loaded.
>> That message would be good google fodder to help folks with =
unbootable systems
>> get back up and running.
>=20
> That's a good idea.
>=20
>> All I know is that I have been without an answer as to how to recover =
between
>> January and a few days ago. That suggests to me the existence of a
>> documentation gap.
>=20
> Perhaps.  It also shows that you have not been researching and/or =
asking actively
> enough.

I love it. I couldn't find the answer, so it's clearly my fault.

>  If you provide reasonable patches to FreeBSD documentation they will =
be
> welcome.

I can't document it if I DON'T KNOW WHAT THE FRIGGING ANSWER IS!

>  You can also blog/etc about your experience, so that other people =
could
> pick your knowledge via search engines.

In fact, I gave a talk at BSDCan about my experience. You'll see a =
reference to this PR on the BSDCan site.

>=20
>> On May 26, 2011, at 8:20 AM, Andriy Gapon <avg@FreeBSD.org> wrote:
>>=20
>>> on 26/05/2011 17:40 Nick Sayer said the following:
>>>> The following reply was made to PR kern/153804; it has been noted =
by
>>>> GNATS.
>>>>=20
>>>> From: Nick Sayer <nsayer@kfu.com> To: bug-followup@FreeBSD.org Cc: =
Subject:
>>>> Re: kern/153804: boot from zfs kernel.old recovery =
undocumented/impossible=20
>>>> Date: Thu, 26 May 2011 07:31:13 -0700
>>>>=20
>>>> Before this gets closed, is someone going to maybe add this to some =
=3D=20
>>>> documentation somewhere? This ought to go in the handbook at the =
very =3D=20
>>>> least.
>>>=20
>>> Which part exactly? IMO, loader(8) should be sufficient.
>>>=20
>>>=20
>>> -- Andriy Gapon
>=20
>=20
> --=20
> Andriy Gapon




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