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Date:      Thu, 23 May 2013 16:44:06 +0430
From:      saeedeh motlagh <>
To:        Warren Block <>
Cc:        freebsd-questions <>
Subject:   Re: file corruption solution (soft-update or ZFS)
Message-ID:  <>
In-Reply-To: <>
References:  <> <>

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thanks for your reply.

you know i have a sensitive server and unfortunately it is located some
where that power outage happens much. so i want guarantee my data and avoid
data lost and file corruption in my server.

i do not have any problem in RAM and hardware.

i don't know which approach is more suitable for my server. using
soft-update or ZFS. please help me to select the best one.

thank you so much

On Thu, May 23, 2013 at 4:28 PM, Warren Block <> wrote:

> On Thu, 23 May 2013, saeedeh motlagh wrote:
>  hello every body
>> i have a question about fixing file corruption in freebsd.
>> now i have freebsd8.2 and some times file corruption happened on it. this
>> issue has a heavy cost for me and i want to avoid it or fixit it
>> completely. so my question is:
>> is it better to upgrade my freebsd to 9.1 and use soft update or migrate
>> from UFS to ZFS?
> That's a judgement call, which means "it depends".
>  i heard so much about soft update -that is added in freebsd9.1-  which can
>> fix file corruption in acceptable way with low cost but i don't know how
>> much is reliable and efficient.
> Several things:
> Soft updates have been around for quite a while.
> Soft updates journaling is the new addition.
> Neither of these address file corruption.  Their purpose is to make sure
> the filesystem does not get corrupted, but individual files could still
> contain bad data.
>  in the other hand, i think migration from UFS to ZFS can be another
>> solution. as i read ZFS is is created to solve all the problems related
>> integrity file system. is it reliable enough in comparison soft-update?
>> now, i want to know which solution is better and why?
> Again, it depends.  Does the target system have enough RAM for ZFS?  If
> the file corruption is due to a hardware problem or an application writing
> bad data, no filesystem can prevent that.


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