/lib/udev/rules.d/64-md-raid-assembly.rules is in mdadm 3.3-2ubuntu7.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 | # do not edit this file, it will be overwritten on update
# assemble md arrays
SUBSYSTEM!="block", GOTO="md_inc_end"
IMPORT{cmdline}="nomdmonisw"
IMPORT{cmdline}="nomdmonddf"
ENV{nomdmonisw}=="1", ENV{ID_FS_TYPE}=="isw_raid_member", GOTO="md_inc_end"
ENV{nomdmonddf}=="1", ENV{ID_FS_TYPE}=="ddf_raid_member", GOTO="md_inc_end"
# handle potential components of arrays (the ones supported by md)
ENV{ID_FS_TYPE}=="ddf_raid_member|isw_raid_member|linux_raid_member", GOTO="md_inc"
GOTO="md_inc_end"
LABEL="md_inc"
# remember you can limit what gets auto/incrementally assembled by
# mdadm.conf(5)'s 'AUTO' and selectively whitelist using 'ARRAY'
ACTION=="add", RUN+="/sbin/mdadm --incremental $devnode --offroot"
ACTION=="remove", ENV{ID_PATH}=="?*", RUN+="/sbin/mdadm -If $name --path $env{ID_PATH}"
ACTION=="remove", ENV{ID_PATH}!="?*", RUN+="/sbin/mdadm -If $name"
LABEL="md_inc_end"
|