Re: lvm or btrfs? which is preferable (when, if applicable)

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On Sat, 2013-01-19 at 19:00 -0600, Ranjan Maitra wrote:
> I move to lvm, or leave things as is, to ext4?

LVM is a container, if you like.  It can span multiple disk drives, so
they appear as one huge drive.  And it can be expanded across even more
drives, if you add them, in the future.  That gives you the advantage of
what appears to be a huge drive.  It gives you the disadvantage that a
failure of any drive could result in the total loss of everything on all
drives.

If you only have one drive, and if you never intend to try that spanning
trick, I recommend that you do not use LVM.  It just adds yet another
problem to a computer system.

Now, for ext4.  It's a filing system.  The partitions inside an LVM can
use ext4, and the partitions inside a single hard drive partitioned in
the traditional way can use ext4.  If you're happy with ext4, don't want
to try another filing system, stick with it.

If considering another filing system, think about why:  Is it faster?
Are their other advantages?  Are their any advantages over your current
one?

And think about why not:  Is there any point in changing?  Are there
disadvantages?  Are there any known flaws?  Are there recovery tools for
dealing with lost, or accidentally deleted data.


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