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Date: Fri, 26 Dec 2008 03:00:35 +0000
From: Bruce Cran <bruce@cran.org.uk>
To: David Wolfskill <david@catwhisker.org>
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Cc: hackers@freebsd.org
Subject: Re: How to quickly determine if UFS2 FS is "clean" from command
 line?
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On Thu, 25 Dec 2008 17:49:56 -0800
David Wolfskill <david@catwhisker.org> wrote:

> A reality check later, I find that for the file systems in question,
> dumpfs(8) produces the wanted information (and quite a bit more)
> nearly instantly, then spends about 33 seconds dumping cylinder group
> information that I have no interest in.

I only ran it on a 2GB filesystem so I didn't see how slow it is!

It looks like ffsinfo(8) can also display the superblock: by
specifying only level 0x001 it should be fast, though the flags are
combined into a single value in the output.

-- 
Bruce Cran