On Mon, 5 May 2014, Theodore Ts'o wrote: > Date: Mon, 5 May 2014 10:28:08 -0400 > From: Theodore Ts'o <tytso@xxxxxxx> > To: Lukáš Czerner <lczerner@xxxxxxxxxx> > Cc: Ext4 Developers List <linux-ext4@xxxxxxxxxxxxxxx> > 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 Yep, it's really useful. I just was not sure what is this all about since there was not description and I was missing context from the other patches. But this makes me think that it would be very useful if blkid could gather this information for other file system if possible :). This might be very useful if we can get some overlap with other file system with the information provided in superblock. Karel, what do you think ? -Lukas
