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: / usr / lib / udev / rules.d /
Filename : 64-md-raid-assembly.rules
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# do not edit this file, it will be overwritten on update

# Don't process any events if anaconda is running as anaconda brings up
# raid devices manually
ENV{ANACONDA}=="?*", GOTO="md_inc_end"
# assemble md arrays

# Also don't process disks that are slated to be a multipath device
ENV{DM_MULTIPATH_DEVICE_PATH}=="1", GOTO="md_inc_end"

SUBSYSTEM!="block", GOTO="md_inc_end"

# skip non-initialized devices
ENV{SYSTEMD_READY}=="0", GOTO="md_inc_end"

# handle potential components of arrays (the ones supported by md)
# For member devices which are md/dm devices, we don't need to
# handle add event. Because md/dm devices need to do some init jobs.
# Then the change event happens.
# When adding md/dm devices, ID_FS_TYPE can only be linux_raid_member
# after change event happens.
ENV{ID_FS_TYPE}=="linux_raid_member", GOTO="md_inc"

# "noiswmd" on kernel command line stops mdadm from handling
#  "isw" (aka IMSM - Intel RAID).
# "nodmraid" on kernel command line stops mdadm from handling
#  "isw" or "ddf".
IMPORT{cmdline}="noiswmd"
IMPORT{cmdline}="nodmraid"

ENV{nodmraid}=="?*", GOTO="md_inc_end"
ENV{ID_FS_TYPE}=="ddf_raid_member", GOTO="md_inc"
ENV{noiswmd}=="?*", GOTO="md_inc_end"
ENV{ID_FS_TYPE}=="isw_raid_member", ACTION!="change", GOTO="md_inc"
GOTO="md_inc_end"

LABEL="md_inc"

# Make sure we don't handle dm devices when some limits are set.
# And linux_raid_member only be set when change/remove event happen.
# So we don't need to consider add event here.
KERNEL=="dm-*", ENV{DM_UDEV_RULES_VSN}!="?*", GOTO="md_inc_end"
KERNEL=="dm-*", ENV{DM_UDEV_DISABLE_OTHER_RULES_FLAG}=="1", GOTO="md_inc_end"
KERNEL=="dm-*", ENV{DM_SUSPENDED}=="1", GOTO="md_inc_end"

# Bare disks are ready when add event happens, the raid can be assembled.
ACTION=="change", KERNEL!="dm-*|md*", GOTO="md_inc_end"

# remember you can limit what gets auto/incrementally assembled by
# mdadm.conf(5)'s 'AUTO' and selectively whitelist using 'ARRAY'
ACTION!="remove", IMPORT{program}="/usr/sbin/mdadm --incremental --export $devnode --offroot $env{DEVLINKS}"
ACTION!="remove", ENV{MD_STARTED}=="*unsafe*", ENV{MD_FOREIGN}=="no", ENV{SYSTEMD_WANTS}+="mdadm-last-resort@$env{MD_DEVICE}.timer"

ACTION=="remove", ENV{ID_PATH}=="?*", RUN+="/usr/sbin/mdadm -If $name --path $env{ID_PATH}"
ACTION=="remove", ENV{ID_PATH}!="?*", RUN+="/usr/sbin/mdadm -If $name"

LABEL="md_inc_end"