[ale] Looking for recommendations on LVM + soft Raid on home server

[Neal Rhodes]

Hmm.  Yes, what I was doing was reducing the size of /home and /u so
that they were in total smaller than the new 1TB disk I bought. 

And the LVM GUI interface tells you it has to umount them, and when you
ok that, of course it can't unmount them. 

So, adding doesn't take a rescue boot.   Only problem is I've already
stuffed the chassis full, so I'm not likely to be adding drives.  I
guess I could replace the 1TB drive with a 2TB drive once they get to be
$9 each next year. 

On Tue, 2012-03-20 at 11:50 -0400, Robert wrote: 

> >Now, I've already messed with logging in as root, unmounting /home
> >and /u, and resizing both. 
> >
> >However, I had to unmount them in order for the native LVM to be willing
> >to do that. which makes perfect sense. 
> 
> I haven't found that to be the case. I regularly resize /, /home, /usr, etc on
> my machines, with no problem. This is for ext* filesystems, I don't know if
> other filesystems have more restrictions. It goes something like this:
> 
>  # lvextend -L +4g /dev/vg/root
>  # resize2fs /dev/vg/root
> 
> It's a little more complicated for shrinking, and I think that you do need a
> rescue disk to shrink anything you can't unmount, like /.
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