From: Christoph Hellwig <hch@infradead.org>
To: "Theodore Y. Ts'o" <tytso@mit.edu>
Cc: Lukas Czerner <lczerner@redhat.com>, linux-ext4@vger.kernel.org
Subject: Re: State of dump utility
Date: Fri, 2 Oct 2020 13:15:33 +0100 [thread overview]
Message-ID: <20201002121533.GA10559@infradead.org> (raw)
In-Reply-To: <20200930020646.GD23474@mit.edu>
On Tue, Sep 29, 2020 at 10:06:46PM -0400, Theodore Y. Ts'o wrote:
> One of the interesting questions is how reliable the dump utility
> really is; that's because it works by reading the metadata directly
> --- while the file system is mounted. So it's quite possible for the
> metadata to be changing out from under the dump/restore process.
> Especially with metadata checksums, I suspect dump/restore is going
> much more unreliable in terms of the libext2fs returning checksum
> failures.
Before using a tool like dumpe2fs you'll need to do a fsfreeze,
and then everything should be fine. Best would be to patch the
tool to issue the freeze/unfreeze ioctls itself.
prev parent reply other threads:[~2020-10-02 12:15 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-29 14:37 State of dump utility Lukas Czerner
2020-09-30 2:06 ` Theodore Y. Ts'o
2020-10-02 12:01 ` Lukas Czerner
2020-10-02 15:17 ` Theodore Y. Ts'o
2020-10-02 12:15 ` Christoph Hellwig [this message]
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