Data loss when hard shutdown!

[Ronald Klop]

On Sat, 02 Oct 2010 14:49:50 +0200, Phan Quoc Hien  
<phanquochien at gmail.com> wrote:

> Thank for your respond. I have checked my fstab file. I didn't see any
> option about SoftUpdates for my / partition.

When you give the command 'mount' you will see several lines like this.

/dev/ad8s1d on /var (ufs, local, soft-updates)

Softupdates can be enabled/disabled with the command tunefs. See 'man  
tunefs'.

My advice is to not pull the power plug after changing critical files, but  
to reboot cleanly. Than there is no problem for 99% of the time and your  
computer is fast also.
Or is there a reason for you to prefer the power plug?

Ronald.


> On Sat, Oct 2, 2010 at 7:25 PM, Bruce Cran <bruce at cran.org.uk> wrote:
>
>> On Sat, 2 Oct 2010 19:19:12 +0700
>> Phan Quoc Hien <phanquochien at gmail.com> wrote:
>>
>> > Thanks for your respond.!
>> > Yes. I pulled the power plug .
>> > I edited rc.conf and save it then pulling the power plug. And system
>> > boot next time rc.conf is a blank file...!
>>
>> This is an issue when using SoftUpdates - data isn't written to disk
>> immediately, and empty files are produced when power is lost. See
>> http://www.freebsd.org/doc/en/books/faq/disks.html#SAFE-SOFTUPDATES for
>> details.
>>
>> --
>> Bruce Cran
>>
>
>