Ubuntu
mdadm package

  1. Bug #330298
  2. Comment #15

Comment 15 for bug 330298

Revision history for this message
RnSC (webclark) wrote : Re: mdadm software raid breaks on intrepid-jaunty upgrade

Continuing with my 8/31 2009 post, I erased the disks and reinstalled 9.04. Still had problem. Reading the mdadm wiki, kernel detection and assembly of arrays is considered deprecated, and only works with version 0.9 superblocks anyway. I use version 1.2 superblocks so that they are near the start of the disk so I can zero them out in a reasonable time when I want to reuse the disks. 8.10 did not have any problem assembling these. I don't know if it is because it FOUND them, or if it looked at mdadm.conf. I did not KNOW about mdadm.conf until a few days ago, so if it assembled them from mdadm.conf, mdadm must have created the file for me. Since arrays using version 1.2 superblocks *cannot* be auto-assembled, my mdadm.conf in 8.10 must have been created for me.

I did a "mdadm --examine --scan >> /etc/mdadm/mdadm.conf" and the system works fine. (Well, there are other mdadm segfault problems which I just put a bug report in for, but that is another story).

So I conclude that *whatever* is supposed to create mdadm.conf when you create an array with command line mdadm commands worked in 8.10, and is broken in 9.04.