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# mdadm configuration file # # mdadm will function properly without the use of a configuration file, # but this file is useful for keeping track of arrays and member disks. # In general, a mdadm.conf file is created, and updated, after arrays # are created. This is the opposite behavior of /etc/raidtab which is # created prior to array construction. # # # the config file takes two types of lines: # # DEVICE lines specify a list of devices of where to look for # potential member disks # # ARRAY lines specify information about how to identify arrays so # so that they can be activated # # You can have more than one device line and use wild cards. The first # example includes SCSI the first partition of SCSI disks /dev/sdb, # /dev/sdc, /dev/sdd, /dev/sdj, /dev/sdk, and /dev/sdl. The second # line looks for array slices on IDE disks. # #DEVICE /dev/sd[bcdjkl]1 #DEVICE /dev/hda1 /dev/hdb1 # # If you mount devfs on /dev, then a suitable way to list all devices is: #DEVICE /dev/discs/*/* # # # The AUTO line can control which arrays get assembled by auto-assembly, # meaing either "mdadm -As" when there are no 'ARRAY' lines in this file, # or "mdadm --incremental" when the array found is not listed in this file. # By default, all arrays that are found are assembled. # If you want to ignore all DDF arrays (maybe they are managed by dmraid), # and only assemble 1.x arrays if which are marked for 'this' homehost, # but assemble all others, then use #AUTO -ddf homehost -1.x +all # # ARRAY lines specify an array to assemble and a method of identification. # Arrays can currently be identified by using a UUID, superblock minor number, # or a listing of devices. # # super-minor is usually the minor number of the metadevice # UUID is the Universally Unique Identifier for the array # Each can be obtained using # # mdadm -D <md> # #ARRAY /dev/md0 UUID=3aaa0122:29827cfa:5331ad66:ca767371 #ARRAY /dev/md1 super-minor=1 #ARRAY /dev/md2 devices=/dev/hda1,/dev/hdb1 # # ARRAY lines can also specify a "spare-group" for each array. mdadm --monitor # will then move a spare between arrays in a spare-group if one array has a failed # drive but no spare #ARRAY /dev/md4 uuid=b23f3c6d:aec43a9f:fd65db85:369432df spare-group=group1 #ARRAY /dev/md5 uuid=19464854:03f71b1b:e0df2edd:246cc977 spare-group=group1 # # When used in --follow (aka --monitor) mode, mdadm needs a # mail address and/or a program. This can be given with "mailaddr" # and "program" lines to that monitoring can be started using # mdadm --follow --scan & echo $! > /run/mdadm/mon.pid # If the lines are not found, mdadm will exit quietly #MAILADDR root@mydomain.tld #PROGRAM /usr/sbin/handle-mdadm-events