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Date:      Wed, 22 Mar 2006 09:23:53 +0300
From:      "Andrew Pantyukhin" <infofarmer@gmail.com>
To:        "Sergey Kovalev" <skoval@mail.mipt.ru>
Cc:        freebsd-questions@freebsd.org
Subject:   Re: Problem with enabling soft-updates via tunefs
Message-ID:  <cb5206420603212223o24b00eb9m49c7440b79a783a3@mail.gmail.com>
In-Reply-To: <44208E99.7060706@mail.mipt.ru>
References:  <44208E99.7060706@mail.mipt.ru>

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On 3/22/06, Sergey Kovalev <skoval@mail.mipt.ru> wrote:
> Several weeks ago I tried enabling soft-updates on / partition of active
> file system in multi-user mode via
> tunefs -n enable /dev/ar0s1a
> having remounted it read-only.
> After that I just rebooted the system and according to mount
> soft-updates were enabled. (I tried remounting / partition to RW w/o
> rebooting but mount showed soft-updates were disabled).
> I was rather satisfied that it is possible w/o making newfs, but today I
> the same actions didn't work on another system (almost the same hardware
> except MB). (I even tried them on the first one, but there everything
> still worked fine).
>
> On second system I got an error something like:
> /dev/ar0s1a: can't write superblock information
> (to my regret I can't remember exactly but I can repeat if necessary)
>
> Differences between system:
> I.
> 1) / partition is the first on disk (256 Mb)
> 2) FreeBSD-5.4-RELEASE-p8 (with patch fixing soft-updates' problem with
> inodes); link to patch http://kovalev.com.ru/softupdates-5.4R-p8.diff.txt
> 3) Custom kernel (i can provide kernel configuration if necessary)
> II.
> 1) / partition was the only partition on disk (approximately 65 Gb);
> there was also second 2 Gb swap partition
> 2) FreeBSD-6.0-RELEASE
> 3) GENERIC kernel
>
> Is there a possibility to enable soft-updates on large / partitions at
> all or there may be something else?
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>

As a side-note, softupdates on / is a bad idea, just
as bad as a single large /



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