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Diffstat (limited to '')
| -rw-r--r-- | TODO | 213 |
1 files changed, 0 insertions, 213 deletions
@@ -1,213 +0,0 @@ - - add 'name' field to metadata type and use it. - - use validate_geometry more - - metadata should be able to check/reject bitmap stuff. - -DDF: - Three new metadata types: - ddf - used only to create a container. - ddf-bvd - used to create an array in a container - ddf-svd - used to create a secondary array from bvds. - - Usage: - mdadm -C /dev/ddf1 /dev/sd[abcdef] - mdadm -C /dev/md1 -e ddf /dev/sd[a-f] - mdadm -C /dev/md1 -l container /dev/sd[a-f] - - Each of these create a new ddf container using all those - devices. The name 'ddf*' signals that ddf metadata should be used. - '-e ddf' only supports one level - 'container'. 'container' is only - supported by ddf. - - mdadm -C /dev/md1 -l0 -n4 /dev/ddf1 # or maybe not ??? - mdadm -C /dev/md1 -l1 -n2 /dev/sda /dev/sdb - If exactly one device is given, and it is a container, we select - devices from that container. - If devices are given that are already in use, they must be in use by - a container, and the array is created in the container. - If devices given are bvds, we slip under the hood to make - the svd arrays. - - mdadm -A /dev/ddf ...... - base drives make a container. Anything in that container is started - auto-read-only. - if /dev/ddf is already assembled, we assemble bvds and svds inside it. - - -2005-dec-20 - Want an incremental assembly mode to work nicely with udev. - Core usage would be something like - mdadm --incr-assemble /dev/newdevice - This would - - examine the device to determine uuid etc. - - look for a match in /etc/mdadm.conf, abort if not found - - find that device and collect current contents - - perform an 'assemble' analysis to make sure we have the best set of devices. - - remove or add devices as appropriate - - possibly start the array if it was complete - - Other usages could involve - - specify which array to auto-add to. - This requires an existing array for uuid matching... is there any point? - - - - - -2004-june-02 - * Don't print 'errors' flag, it is meaningless. DONE - * Handle new superblock format - * create device file on demand, particularly partitionable devices. DONE - BUT figure a way to create the partition devices. - auto=partN - * Use Event: interface to listen for events. DONE, untested - * Make sure mdadm -As can assemble multi-level RAIDs ok. - * --build to build raid1 or multipath arrays - clean or not ??? - ----------------------------------------------------------------------------- -* mdadm --monitor to monitor failed multipath paths and re-instate them. - -* Maybe make "--help" fit in 80x24 and have a --long-help with more info. DONE - - -* maybe "missing" instead of <bold>missing</> in doco DONE -* possibly wait for resync to start, or even finish while assembling.- NO - -* -Db should have a devices= entry if possible. - DONE -* when assembling multipath arrays, ignore any error indicators. - DONE -* rationalise --monitor usage: - mdadm --monitor - doesn't do as expected. DONE - -* --assemble could have a --update option. - DONE - following word can be: - sparc2.2 - super-minor - -* mdadm /dev/md11, where md11 is raid0 can segfault, particularly when looking in the - [UU_UUU] string ... which doesn't exist ! -It should be more sensible. DONE - -Example: - -from Raimund Sacherer <raimund.sacherer@ngit.at> - -mke2fs -m0 -q /dev/ram1 300 -mount -n -t ext2 /dev/ram1 /tmp -echo DEVICE /dev/[sh]* >> /tmp/mdadm.conf -mdadm -Esb /dev/[sh]* 2>/dev/null >> /tmp/mdadm.conf -mdadm -ARsc /tmp/mdadm.conf -umount /tmp - - -?? Allow -S /dev/md? - current complains subsequent not a/d/r - DONE - -* new "Query" mode to subsume --detail and --examine. - --query or -Q, takes a device and tells if it is an MD device, - and also tells in a raid superblock is found. - DONE - -* write mdstat.c to parse /proc/mdstat file - Build list of arrays: name, rebuild-percent - DONE - -* parse /proc/partitions and map major/minor into /dev/* names, - and use that for default DEVICE list ???? - -* --detail --scan to read /proc/mdstat, and then iterate over these, - but assume --brief. --verbose can override - check each subdevice to see if it is in conf_get_devs. - Warn if not. - DONE, but don't warn yet... - -* Support multipath ... maybe... - maybe DONE - -* --follow to syslog - -* --follow to move spares around DONE - -* --follow to notice other events: DONE - rebuild started - spare activated - spare removed - spare added - ------------------------------------- -- --examine --scan scans all drives and build an mdadm.conf file DONE - -- check superblock checksum in examine DONE -- report "chunk" or "rounding" depending on raid level DONE -- report "linear" instead of "-1" for raid level DONE -- decode ayout depending on raid level DONE -- --verbose and --force flags. DONE - -- set md_minor, *_disks for Create - DONE -- for create raid5, how to choose between - all working, but not insync - one missing, one spare, insync DONE (--force) -- and for raid1 - some failed drives... (missing) - -- when RUN_ARRAY, make sure *_disks counts are right - -- get --detail to extract extra stuff from superblock, - like uuid DONE -- --detail --brief to give a config file line DONE -- parse config file. DONE -- test... - -- when --assemble --scan, if an underlying device is an md device, - then try to assemble that device first. - - -- mdadm -S /dev/md0 /dev/md1 gives internal error FIXED - -- mdadm --detail --scan print summary of what it can find? DONE - - ---------- -Assemble doesn't add spares. - DONE -Create to allow "missing" name for devices. -Create to accept "--force" for do exactly what is requested -- get Assemble to upgrade devices if force flag. -ARRAY lines in config file to have super_minor=n -ARRAY lines in config file to have device=pattern, and only accept - those devices - If UUID given, insist on that - If not, but super_minor given, require all found with that minor - to have same uuid - If only device given, all valid supers on those devices must have - same uuid -allow /dev/mdX as first argument before any options -Possible --dry-run option for create and assemble--force - -Assemble to check that all devices mentioned in superblock - are present. - -New mode: --Monitor (or --Follow) - Periodically check status of all arrays (listed in config file). - Log every event and apparent cause - or differences - Email and alert - or run a program - for important events - Move spares around if necessary. - - An Array line can have a spare-group= field that indicates that - the array shares spares with other arrays with the same - spare-group name. - If an array has a failed and no spares, then check all other - arrays in the spare group. If one has no failures and a spare, - then consider that spare. - Choose the smallest considered spare that is large enough. - If there is one, then hot-remove it from it's home, and - hot-add it to the array in question. - - --mail-to address - --alert-handler program - - Will also extract information from /proc/mdstat if present, - and consider 20% marks in rebuild as events. - - Events are: - drive fails - causes mail to be sent - rebuild started - spare activated - spare removed - spare added |