Reuniting disks in a raid1 array

From	Frédéric Marchal <frederic.marchal@wowtechnology.com>
Newsgroups	linux.debian.user
Subject	Reuniting disks in a raid1 array
Date	2016-08-30 07:40 +0200
Message-ID	<sbJW9-BZ-1@gated-at.bofh.it> (permalink)
Organization	Wow Technology

Show all headers | View raw

Hello,

I had two disks in a mdadm software raid1 on an old computer.

I moved sda to a new computer. It ran there in a degraded raid1 for months.

The second disk, sdb, kept running as the lone survivor of the original raid1 
on the old computer.

Now, it's time for the old computer to retire and sdb to join its partner in 
the new raid1 on the new computer.

How can I do this safely?

Do I have to wipe sdb before adding it to the new computer? If so, how do I 
make sure raid data is gone from every one of the three partitions?

Or maybe mdadm will see that sda was used more recently than sdb and will 
synchronize sda onto sdb?

Thanks,

Frederic

Back to linux.debian.user | Previous | Next — Next in thread | Find similar | Unroll thread

Thread

Reuniting disks in a raid1 array Frédéric Marchal <frederic.marchal@wowtechnology.com> - 2016-08-30 07:40 +0200
  Re: Reuniting disks in a raid1 array Lars Noodén <lars.nooden@gmail.com> - 2016-08-30 10:40 +0200
    Re: Reuniting disks in a raid1 array Lars Noodén <lars.nooden@gmail.com> - 2016-08-30 10:50 +0200
    Re: Reuniting disks in a raid1 array Frédéric Marchal <frederic.marchal@wowtechnology.com> - 2016-08-30 11:10 +0200
  Re: Reuniting disks in a raid1 array Mirko Parthey <mirko.parthey@web.de> - 2016-08-30 12:30 +0200
    Re: Reuniting disks in a raid1 array Pascal Hambourg <pascal@plouf.fr.eu.org> - 2016-08-30 20:20 +0200

csiph-web