TODO

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