Date: Sat, 02 Oct 2010 14:02:54 +0200 From: "Ronald Klop" <ronald-freebsd8@klop.yi.org> To: freebsd-fs@freebsd.org Subject: Re: Data loss when hard shutdown! Message-ID: <op.vjx6e4o08527sy@212-123-145-58.ip.telfort.nl> In-Reply-To: <AANLkTi=eib81J1zUT_HmPcXOBFiLDFmyA8Q-KZV5HikE@mail.gmail.com> References: <AANLkTi=eib81J1zUT_HmPcXOBFiLDFmyA8Q-KZV5HikE@mail.gmail.com>
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On Sat, 02 Oct 2010 13:28:59 +0200, Phan Quoc Hien <phanquochien@gmail.com> wrote: > hello everybody. > I'm new to freebsd, When I hard shutdown my freebsd box..it caused lost > some > file. I used UFS2. How can prevent that? or recovery my file? > Thanks! > By hard shutdown you mean pulling the power plug? UFS2 (and most other filesystems on other operating systems) guarantee consistency of metadata (filenames, directory structures, etc.) after a crash. However it is possible to loose the last X seconds of unwritten data. That can be the complete contents of a new file. If it is really important you can mount your filesystem 'sync' see 'man mount' in which case it will become slow, but more up-to-date. Ronald.
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