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Re: mdadm - two questions

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On Tuesday 22 November 2016 18:10:53 Kamil Jońca wrote:
> 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?

I can only answer this question. I did something similar on an old computer 
several years ago except I had to grow the LV using other partitions instead 
of adding new disks.

The computer had two disks. Each disk had a partition assembled as a raid1 
array md0. md0 was the only PV of the VG.

When I had to grow the VG, I reclaimed two existing partitions from each disk 
and assembled them as md1 and md2. Then I added /dev/md1 and /dev/md2 to the 
VG.

It doesn't matter to the VG if it is made of /dev/sda1 and /dev/sdb2 or 
/dev/md0 and /dev/md1.

Then follow the usual procedure to grow the LV and the file system.

Frederic

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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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