mdadm - two questions

From	kjonca@poczta.onet.pl (Kamil Jońca)
Newsgroups	linux.debian.user
Subject	mdadm - two questions
Date	2016-11-22 18:40 +0100
Message-ID	<sGnd0-1Py-47@gated-at.bofh.it> (permalink)
Organization	linux.* mail to news gateway

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(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?

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?

KJ

-- 
http://stopstopnop.pl/stop_stopnop.pl_o_nas.html
Oh yeah.  Forgot about those.  Getting senile, I guess...
		-- Larry Wall in <199710261551.HAA17791@wall.org>

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mdadm - two questions   kjonca@poczta.onet.pl (Kamil Jońca) - 2016-11-22 18:40 +0100
  Re: mdadm - two questions Dan Ritter <dsr@randomstring.org> - 2016-11-22 19:10 +0100
    Re: mdadm - two questions kjonca@poczta.onet.pl (Kamil Jońca) - 2016-11-22 21:40 +0100
      Re: mdadm - two questions Dan Ritter <dsr@randomstring.org> - 2016-11-22 22:00 +0100
        Re: mdadm - two questions kjonca@poczta.onet.pl (Kamil Jońca) - 2016-11-23 06:40 +0100
      Re: mdadm - two questions Jens Sauer <jsauer65@gmail.com> - 2016-11-22 22:10 +0100
  Re: mdadm - two questions Frédéric Marchal <frederic.marchal@wowtechnology.com> - 2016-11-23 14:10 +0100
  Re: mdadm - two questions kjonca@poczta.onet.pl (Kamil Jońca) - 2016-11-29 01:50 +0100
    Re: mdadm - two questions Andy Smith <andy@strugglers.net> - 2016-11-30 06:10 +0100
      Re: mdadm - two questions   Rick Thomas <rbthomas@pobox.com> - 2016-11-30 10:50 +0100
        Re: mdadm - two questions kjonca@poczta.onet.pl (Kamil Jońca) - 2016-11-30 13:10 +0100
          Re: mdadm - two questions   Rick Thomas <rbthomas@pobox.com> - 2016-11-30 14:20 +0100
      Re: mdadm - two questions kjonca@poczta.onet.pl (Kamil Jońca) - 2016-11-30 13:00 +0100
  mdadm - Progress mails of checkarray now missing Hans Kraus <hans@hanswkraus.com> - 2016-12-10 21:10 +0100

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