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Date:      Mon, 22 May 2000 16:13:38 -0700
From:      Alfred Perlstein <bright@wintelcom.net>
To:        furio ercolessi <furio@spin.it>
Cc:        freebsd-questions@FreeBSD.ORG
Subject:   Re: Cannot start softupdates, why?
Message-ID:  <20000522161337.A28097@fw.wintelcom.net>
In-Reply-To: <20000523002721.C10915@spin.it>; from furio@spin.it on Tue, May 23, 2000 at 12:27:21AM %2B0200
References:  <20000523002721.C10915@spin.it>

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* furio ercolessi <furio@spin.it> [000522 16:04] wrote:
> Hi all,
> 
> I am trying to enable softupdates on my /var partition, but 
> I am having difficulties  (I am a FreeBSD newbie migrating
> from Linux exactly to improve filesystem performance; please
> bear with me).
> 
> I did "ln -s ../../contrib/softupdates/*.[ch] ."  in /usr/src/sys/ufs/ffs.
> I put "options SOFTUPDATES" in /usr/src/sys/i386/conf/<NAME>.
> I make-installed the custom kernel.
> I rebooted, went single user, unmounted my /var partition and did
>    # tunefs -n enable /dev/da0s1e
>    tunefs: soft updates set
>    # tunefs -p /dev/da0s1e
>    tunefs: soft updates:  (-n)                                enabled
>      [...more output...]
>    # mount /dev/da0s1e /var
>    # mount
>      [...]
>    /dev/da0s1e on /var (ufs, local, writes: sync 2 async 0)
> 
> Now I understand that at this point softupdates should appear
> in the list within (...).  And this is not just a failure of mount 
> to show it: I ran performance tests without seeing any difference 
> between "enabled" and "disabled".   
> I must have forgotten to do something.  Thanks for any clue...
> (I am on 3.4-RELEASE on a vulgar i586 platform).

afaik under 3.x you must tunefs the raw device (/dev/rda0s1e).

hope this helps,
-Alfred


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