Re: netbsd-6 BETA2: raid starts after cgd.

[David Brownlee <abs%netbsd.org@localhost>]

On 22 July 2012 17:45, Alan Barrett <apb%cequrux.com@localhost> wrote:
> On Sun, 01 Jul 2012, David Brownlee wrote:
>>
>> On 28 June 2012 18:02, Jimmy Johansson <jimmy%update.uu.se@localhost> wrote:
>>>
>>> [problems because /etc/rc.d/cgd runs before /etc/rc.d/raidframe]
>>>
>>> Everything seems to run as expected if I add "# BEFORE: cgd" to
>>> /etc/rc.d/raidframe, which seems to support that my problem indeed is
>>> that cgd is started before raidframe.
>>>
>>> Starting raidframe before cgd makes more sense in my opinion, because
>>> I'd rather run a cgd ontop of a raid instead of a raid ontop 2 cgds.
>>>
>>> I'd like to finish off by saying that everything else with NetBSD 6 BETA2
>>> has been smooth sailing, except for this little snag.
>>
>> I could see a use case either way, though I agree cgd-on-raid is
>> probably more common than raid-on-cgd.
>>
>> Would anyone have any objections to changing the default?
>
> At present, there's nothing to explicitly set the relative order in which
> /etc/rc.d/cgd and /etc/rc.d/raidframe are run.  cgd happens to run first due
> to an implementation choice in rcorder(8), but this is not promised by the
> interface.
>
> I'd suggest leaving the defaults unchanged in NetBSD, and doing one of
> the following on the end user's system:
>
>   * Use raidframe auto-configuration, to make the kernel
>     configure the raid(4) devices earlier.
>
>   * Edit /etc/rc.d/cgd to add "REQUIRE: raidframe"
>
>   * Edit /etc/rc.d/raidframe to add "BEFORE: cgd"
>
>   * Add an extra file, /etc/rc.d/cgd-before-aidframe or something,
>     with both "REQUIRE: cgd" and "BEFORE: raidframe".

It turned out the current situation was actually the best default, as
it allows raid-on-cgd, cgd-on-raid, and raid-on-cgd-on-raid - as long
as the final -on-raid was set to autoconfigure :)