TODO

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