On Tue, Nov 22, 2016 at 06:10:53PM +0100, Kamil Jońca wrote: > (I do not know it is proper place to ask these questions.) > 1. > man mdadm has some info about CONTAINER-s. > > I think, that I understand how to use it, but I cannot imagine use case > of containers. > Can someone explain whent it is desirable to use containers, especially > DDF instead of free mdX devices?
Only when you have bizarre Windows compatibility needs and appropriate hardware. > 2. there is md0 (raid1) with two disk in it. It is PV for lvm. > I want to extend space by adding another two disks. Is it possible somehow > extent md0? Or the only way is to create second md device, and assign it > to volume group? Both are available: https://raid.wiki.kernel.org/index.php/Growing but if you're doing this frequently, you should consider ZFS instead of mdadm and lvm. -dsr-