TODO

   1 * Maybe make "--help" fit in 80x24 and have a --long-help with more info. DONE
   2
   3
   4 * maybe "missing" instead of <bold>missing</> in doco DONE
   5 * possibly wait for resync to start, or even finish while assembling.- NO
   6
   7 * -Db should have a devices= entry if possible. - DONE
   8 * when assembling multipath arrays, ignore any error indicators. - DONE
   9 * rationalise --monitor usage:
  10      mdadm --monitor
  11   doesn't do as expected. DONE
  12
  13 * --assemble could have a --update option. - DONE
  14   following word can be:
  15         sparc2.2
  16         super-minor
  17
  18 * mdadm /dev/md11, where md11 is raid0 can segfault, particularly when looking in the
  19    [UU_UUU] string ... which doesn't exist !
  20 It should be more sensible.  DONE
  21
  22 Example:
  23
  24 from  Raimund Sacherer <raimund.sacherer@ngit.at>
  25
  26 mke2fs -m0 -q /dev/ram1 300
  27 mount -n -t ext2 /dev/ram1 /tmp
  28 echo DEVICE /dev/[sh]* >> /tmp/mdadm.conf
  29 mdadm -Esb /dev/[sh]* 2>/dev/null >> /tmp/mdadm.conf
  30 mdadm -ARsc /tmp/mdadm.conf
  31 umount /tmp
  32
  33
  34 ?? Allow -S /dev/md? - current complains subsequent not a/d/r - DONE
  35
  36 * new "Query" mode to subsume --detail and --examine.
  37    --query or -Q, takes a device and tells if it is an MD device,
  38    and also tells in a raid superblock is found.
  39  DONE
  40
  41 * write mdstat.c to parse /proc/mdstat file
  42    Build list of arrays:  name, rebuild-percent
  43   DONE
  44
  45 * parse /proc/partitions and map major/minor into /dev/* names,
  46   and use that for default DEVICE list ????
  47
  48 * --detail --scan to read /proc/mdstat, and then iterate over these,
  49     but assume --brief.  --verbose can override
  50     check each subdevice to see if it is in conf_get_devs.
  51     Warn if not.
  52   DONE, but don't warn yet...
  53
  54 * Support multipath ... maybe...
  55   maybe DONE
  56
  57 * --follow to syslog
  58
  59 * --follow to move spares around DONE
  60
  61 * --follow to notice other events: DONE
  62      rebuild started
  63      spare activated
  64      spare removed
  65      spare added
  66
  67 ------------------------------------
  68 - --examine --scan scans all drives and build an mdadm.conf file DONE
  69
  70 - check superblock checksum in examine DONE
  71 - report "chunk" or "rounding" depending on raid level DONE
  72 - report "linear" instead of "-1" for raid level DONE
  73 - decode ayout depending on raid level DONE
  74 - --verbose and --force flags. DONE
  75
  76 - set md_minor, *_disks for Create  - DONE
  77 - for create raid5, how to choose between
  78    all working, but not insync
  79    one missing, one spare, insync  DONE (--force)
  80 - and for raid1 - some failed drives...  (missing)
  81
  82 - when RUN_ARRAY, make sure *_disks counts are right
  83
  84 - get --detail to extract extra stuff from superblock,
  85    like uuid  DONE
  86 - --detail --brief to give a config file line DONE
  87 - parse config file. DONE
  88 - test...
  89
  90 - when --assemble --scan, if an underlying device is an md device,
  91   then try to assemble that device first.
  92
  93
  94 - mdadm -S /dev/md0 /dev/md1 gives internal error FIXED
  95
  96 - mdadm --detail --scan print summary of what it can find? DONE
  97
  98
  99 ---------
 100 Assemble doesn't add spares. - DONE
 101 Create to allow "missing" name for devices.
 102 Create to accept "--force" for do exactly what is requested
 103 - get Assemble to upgrade devices if force flag.
 104 ARRAY lines in config file to have super_minor=n
 105 ARRAY lines in config file to have device=pattern, and only accept
 106    those devices
 107    If UUID given, insist on that
 108    If not, but super_minor given, require all found with that minor
 109     to have same uuid
 110    If only device given, all valid supers on those devices must have
 111     same uuid
 112 allow /dev/mdX as first argument before any options
 113 Possible --dry-run option for create and assemble--force
 114
 115 Assemble to check that all devices mentioned in superblock
 116   are present.
 117
 118 New mode: --Monitor (or --Follow)
 119   Periodically check status of all arrays (listed in config file).
 120   Log every event and apparent cause - or differences
 121   Email and alert - or run a program - for important events
 122   Move spares around if necessary.
 123
 124   An Array line can have a spare-group= field that indicates that
 125    the array shares spares with other arrays with the same
 126    spare-group name.
 127    If an array has a failed and no spares, then check all other
 128      arrays in the spare group.  If one has no failures and a spare,
 129      then consider that spare.
 130     Choose the smallest considered spare that is large enough.
 131     If there is one, then hot-remove it from it's home, and
 132     hot-add it to the array in question.
 133
 134   --mail-to address
 135   --alert-handler program
 136
 137   Will also extract information from /proc/mdstat if present,
 138   and consider 20% marks in rebuild as events.
 139
 140   Events are:
 141      drive fails  - causes mail to be sent
 142      rebuild started
 143      spare activated
 144      spare removed
 145      spare added