linux-ext4 - Re: [PATCH 2/3] mke2fs: print extra information about existing ext2/3/4 file systems

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Message-ID: <20140505142808.GF22287@thunk.org>
Date:	Mon, 5 May 2014 10:28:08 -0400
From:	Theodore Ts'o <tytso@....edu>
To:	Lukáš Czerner <lczerner@...hat.com>
Cc:	Ext4 Developers List <linux-ext4@...r.kernel.org>
Subject: Re: [PATCH 2/3] mke2fs: print extra information about existing
 ext2/3/4 file systems

On Mon, May 05, 2014 at 10:04:01AM -0400, Theodore Ts'o wrote:
> The basic idea behinid these patches is that we now get a bit more
> context with the warning message for ext2/3/4 file systems:
> 
> % ./misc/mke2fs -t ext4 /dev/heap/media
> mke2fs 1.42.9 (4-Feb-2014)
> /dev/heap/media contains a ext4 file system labelled 'media'
> 		  last mounted on /media on Mon May  5 08:59:53 2014
> Proceed anyway? (y,n) 

And actually, the place where this context is critically important is
in this case (where let's say, the user typo's sdc3 when they meant to
type sdd3):

% ./misc/mke2fs -t ext4 /dev/sdc3
mke2fs 1.42.9 (4-Feb-2014)
/dev/sdc3 contains a ext4 file system
	last mounted on /SOX-backups on Mon May  5 08:59:53 2014
Proceed anyway? (y,n) 

... where this becomes a last-ditch saving through against the
accidental wiping of the enterprise's Sarbanes-Oxley records.  :-)

						- Ted
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