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List:       freebsd-doc
Subject:    Re: Misprint in Architecture Handbook?
From:       Benjamin Kaduk <kaduk () MIT ! EDU>
Date:       2013-06-24 15:00:22
Message-ID: alpine.GSO.1.10.1306241058540.26275 () multics ! mit ! edu
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On Sun, 23 Jun 2013, Chip Senkbeil wrote:

> Hello,
>
> I was taking a look at the guide for SSDs and FreeBSD (
> http://www.freebsd.org/doc/en/articles/solid-state/index.html) and think
> that there "might" be some old instructions. On the second page (
> http://www.freebsd.org/doc/en/articles/solid-state/kernel.html), the
> instructions say to add "options MFS", "options MD_ROOT", and
> "pseudo-device md" to your kernel configuration. I've been searching
> briefly (very briefly) and came across a fairly old post (
> http://lists.freebsd.org/pipermail/freebsd-stable/2005-May/015115.html)
> claiming that pseudo-device is no longer used or is at least deprecated.
> Trying to add that option gave me a syntax error; so, I'm going out on a
> limb to say that the option isn't supported? I later found in the generic
> kernel that the line "device md" is already in place with the comment
> "Pseudo devices."
>
> Another issue (this may or may not be a fault of my own) is regarding
> "options MFS" as a suggested addition to the configuration. Attempt to
> include the option and build the kernel yields an unknown option error.
> I'll be digging around, but if this is blatantly no longer the correct
> option, please let me know!
>
> The final option regarding MD_ROOT was already included in the generic
> kernel; so, I guess that's fine to still reference.
>
> I haven't taken a look at the later pages since I wasn't able to build the
> kernel. Since I'm not very familiar with FreeBSD, I wouldn't know what to
> look for in terms of outdated material. If this page is indeed out of date,
> it might be worth adding to the backlog to take a look at the rest of the
> SSD material to ensure it isn't old.

Hi Chip,

I believe you are correct; unfortuately, the architecture handbook has 
many places which are woefully out of date, and there is no ETA for fixes.

Could you file a PR or three noting these issues? 
(http://www.freebsd.org/send-pr.html)

Thanks,

Ben Kaduk
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