Ubuntu
mdadm package

  1. Bug #541058
  2. Comment #3

Comment 3 for bug 541058

Revision history for this message
Sami Haahtinen (ressu) wrote : Re: mdadm fails to assemble raid during boot

Confirming the bug. This is caused by udev trying to assemble the md device with --incremental. The /var/run/mdadm directory is missing from the initramfs image and the array map is not created and mdadm gets confused.

The solution is to add the following line to /usr/share/initramfs-tools/hooks/mdadm

mkdir -p ${DESTDIR}/var/run/mdadm

After this, the array is assembled correctly on boot