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mdadm/0015-mdadm-remove-TODO.patch

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From a944da4e1a56cd926e6b21f5aaebc13198265419 Mon Sep 17 00:00:00 2001
From: Mariusz Tkaczyk <mariusz.tkaczyk@linux.intel.com>
Date: Fri, 23 Feb 2024 15:51:42 +0100
Subject: [PATCH 15/41] mdadm: remove TODO
This file is not updated in 16 years.
No reasons to keep it. Remove it.
Signed-off-by: Mariusz Tkaczyk <mariusz.tkaczyk@linux.intel.com>
---
TODO | 213 -----------------------------------------------------------
1 file changed, 213 deletions(-)
delete mode 100644 TODO
diff --git a/TODO b/TODO
deleted file mode 100644
index 279d20db..00000000
--- a/TODO
+++ /dev/null
@@ -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
--
2.40.1
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