TODO

   1
   2 Document "missing"
   3
   4
   5 ?? Allow -S /dev/md? - current complains subsequent not a/d/r - DONE
   6
   7 * new "Query" mode to subsume --detail and --examine.
   8    --query or -Q, takes a device and tells if it is an MD device,
   9    and also tells in a raid superblock is found.
  10  DONE
  11
  12 * write mdstat.c to parse /proc/mdstat file
  13    Build list of arrays:  name, rebuild-percent
  14   DONE
  15
  16 * parse /proc/partitions and map major/minor into /dev/* names,
  17   and use that for default DEVICE list ????
  18
  19 * --detail --scan to read /proc/mdstat, and then iterate over these,
  20     but assume --brief.  --verbose can override
  21     check each subdevice to see if it is in conf_get_devs.
  22     Warn if not.
  23   DONE, but don't warn yet...
  24
  25 * Support multipath ... maybe...
  26   maybe DONE
  27
  28 * --follow to syslog
  29
  30 * --follow to move spares around
  31
  32 * --follow to notice other events:
  33      rebuild started
  34      spare activated
  35      spare removed
  36      spare added
  37
  38 ------------------------------------
  39 - --examine --scan scans all drives and build an mdadm.conf file DONE
  40
  41 - check superblock checksum in examine DONE
  42 - report "chunk" or "rounding" depending on raid level DONE
  43 - report "linear" instead of "-1" for raid level DONE
  44 - decode ayout depending on raid level DONE
  45 - --verbose and --force flags. DONE
  46
  47 - set md_minor, *_disks for Create  - DONE
  48 - for create raid5, how to choose between
  49    all working, but not insync
  50    one missing, one spare, insync  DONE (--force)
  51 - and for raid1 - some failed drives...  (missing)
  52
  53 - when RUN_ARRAY, make sure *_disks counts are right
  54
  55 - get --detail to extract extra stuff from superblock,
  56    like uuid  DONE
  57 - --detail --brief to give a config file line DONE
  58 - parse config file. DONE
  59 - test...
  60
  61 - when --assemble --scan, if an underlying device is an md device,
  62   then try to assemble that device first.
  63
  64
  65 - mdadm -S /dev/md0 /dev/md1 gives internal error FIXED
  66
  67 - mdadm --detail --scan print summary of what it can find?
  68
  69
  70 ---------
  71 Assemble doesn't add spares. - DONE
  72 Create to allow "missing" name for devices.
  73 Create to accept "--force" for do exactly what is requested
  74 - get Assemble to upgrade devices if force flag.
  75 ARRAY lines in config file to have super_minor=n
  76 ARRAY lines in config file to have device=pattern, and only accept
  77    those devices
  78    If UUID given, insist on that
  79    If not, but super_minor given, require all found with that minor
  80     to have same uuid
  81    If only device given, all valid supers on those devices must have
  82     same uuid
  83 allow /dev/mdX as first argument before any options
  84 Possible --dry-run option for create and assemble--force
  85
  86 Assemble to check that all devices mentioned in superblock
  87   are present.
  88
  89 New mode: --Monitor (or --Follow)
  90   Periodically check status of all arrays (listed in config file).
  91   Log every event and apparent cause - or differences
  92   Email and alert - or run a program - for important events
  93   Move spares around if necessary.
  94
  95   An Array line can have a spare-group= field that indicates that
  96    the array shares spares with other arrays with the same
  97    spare-group name.
  98    If an array has a failed and no spares, then check all other
  99      arrays in the spare group.  If one has no failures and a spare,
 100      then consider that spare.
 101     Choose the smallest considered spare that is large enough.
 102     If there is one, then hot-remove it from it's home, and
 103     hot-add it to the array in question.
 104
 105   --mail-to address
 106   --alert-handler program
 107
 108   Will also extract information from /proc/mdstat if present,
 109   and consider 20% marks in rebuild as events.
 110
 111   Events are:
 112      drive fails  - causes mail to be sent
 113      rebuild started
 114      spare activated
 115      spare removed
 116      spare added