/lib/dracut/modules.d/95udev-rules/ Current File: //lib/dracut/modules.d/95udev-rules/61-persistent-storage.rules
SUBSYSTEM!="block", GOTO="pss_end"
ACTION!="add|change", GOTO="pss_end"
# Also don't process disks that are slated to be a multipath device
ENV{DM_MULTIPATH_DEVICE_PATH}=="1", GOTO="pss_end"

ACTION=="change", KERNEL=="dm-[0-9]*", ENV{DM_UDEV_DISABLE_OTHER_RULES_FLAG}!="1", GOTO="do_pss"
KERNEL=="cciss[0-9]*", GOTO="do_pss"
KERNEL=="nbd[0-9]*", GOTO="do_pss"
KERNEL=="md[0-9]*|md_d[0-9]*|md/*", GOTO="do_pss"

GOTO="pss_end"

LABEL="do_pss"
# by-path (parent device path)
ENV{DEVTYPE}=="disk", ENV{ID_PATH}=="", DEVPATH!="*/virtual/*", IMPORT PATH_ID
ENV{DEVTYPE}=="disk", ENV{ID_PATH}=="?*", SYMLINK+="disk/by-path/$env{ID_PATH}"
ENV{DEVTYPE}=="partition", ENV{ID_PATH}=="?*", SYMLINK+="disk/by-path/$env{ID_PATH}-part%n"

# by-label/by-uuid links (filesystem metadata)
ENV{ID_FS_USAGE}=="filesystem|other|crypto", ENV{ID_FS_UUID_ENC}=="?*", SYMLINK+="disk/by-uuid/$env{ID_FS_UUID_ENC}"
ENV{ID_FS_USAGE}=="filesystem|other", ENV{ID_FS_LABEL_ENC}=="?*", SYMLINK+="disk/by-label/$env{ID_FS_LABEL_ENC}"
LABEL="pss_end"