Please check the status of this specification in Launchpad before editing it. If it is Approved, contact the Assignee or another knowledgeable person before making changes.
Launchpad entry: [https://features.launchpad.net/distros/ubuntu/+spec/udev-mdadm udev-mdadm]
Packages affected: udev, mdadm
This specification details how to make udev and mdadm play nicely together, in particular ensuring that udev events are issued for mdadm volumes and that UUIDs are correctly exported and do not conflict.
mdadm is used by system administrators to... In order to support event-based mounting of these filesystems, we need reliable events from the block subsystem and no race conditions.
The scope of this specification is limited to the interaction between udev and mdadm; other specifications address similar concerns with device-mapper, LVM, etc.
Data preservation and migration