TODO

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