Changes Prior to this release
+ - Fixed UUID printing in "--detail --brief" for version1 metadata.
+ - --update=resync did exactly the wrong thing for version1 metadata.
+ It caused a resync to not happen, rather than to happen.
+ - Allow --assemble --force to mark a raid6 clean when it has two
+ missing devices (which is needed else if won't assemble.
+ Without this fix it would only assemble if one or zero
+ missing devices.
+ - Support --update=devicesize for cases where the underlying device
+ can change size.
+ - Default to --auto=yes so the array devices with 'standard' names
+ get created automatically, as this is almost always what is wanted.
+ - Give useful message if raid4/5/6 cannot be started because it is
+ not clean and is also degraded.
+ - Increase raid456 stripe cache size if needed to --grow the array.
+ The setting used unfortunately requires intimate knowledge of the
+ kernel, and it not reset when the reshape finishes.
+ - Change 'Device Size' to 'Used Dev Size' because it only shows how
+ much of each device is actually used, not how big they are.
+ - --wait or -W will wait for resync activity to finish on the given
+ devices.
+ - Fix some problems with --update=uuid and add a test.
+ - If two drives in a raid5 disappear at the same time, then "-Af"
+ will add them both in rather than just one and forcing the array
+ to 'clean'. This is slightly safer in some cases.
+ - Check device is large enough before hot-add: this improves quality
+ of error message.
+ - Don't hold md device open for so long in --monitor mode - map_dev
+ can be slow and interferes with trying to stop the array.
+ - Support --uuid= with --create to choose your own UUID.
+
+Changes Prior to 2.5.6 release
+ - Fix bug which meant "bitmap=xxx" in mdadm.conf was not handled
+ properly.
+ - Documentation updates.
+ - Fix bug that caused infinite loop when doing auto-assembly,
+ in certain cases where arrays couldn't be assembled.
+
+Changes Prior to 2.5.5 release
+ - Don't #include linux/blkpg.h as that isn't safe. Just
+ include the content literally.
+ - Reduce maximum bitmap usage when working with bitmap files,
+ so that a only single-page allocations are made, even on
+ 64bit hosts with 4K pages.
+ - Close stray fd in mdassemble so that it can assemble stacked
+ devices
+ - If mdassemble finds an array already assembled, it marks it
+ read-write.
+ - Remove error in md_open if array is already active. This isn't
+ needed and gets in the ways if an array was created e.g. in
+ initramfs, but device doesn't yet exist in /dev.
+ - When --assemble --scan is run, if all arrays that could be found
+ have already been started, don't report an error.
+ - Fix a couple of bugs related to raid10 and the new 'offset' layout.
+ - Improve error message when a wrong '--update' option is given.
+
+Changes Prior to 2.5.4 release
+ - When creating devices in /dev/md/ create matching symlinks
+ from /dev. e.g. /dev/md0 -> /dev/md/0.
+ Allow this to be disabled in mdadm.conf or on command line.
+ - Fix some endian-ness issues with version-1 superblocks (affects
+ bigendian only).
+ - Fix endian problem with 'bitmap' metadata
+ - Allow a number (of partitions) after the 'yes' option to --auto=
+ This is particularly useful in the 'create' line in mdadm.conf.
+ - Remove partitions from any whole device that is made part of
+ an md array. This is a work-around for annoying messages
+ when the first block on some drive accidentally looks like a
+ partition table.
+
+Changes Prior to 2.5.3 release
+ - Document v0.91 superblocks in md.4
+ - Make GPL explicit in man pages.
+ - Fix recent breakage of starting degraded arrays.
+ - Tidyup automatic name choice for v-1 arrays:
+ /dev/md_d0 now becomes '0', not '_d0'.
+
+Changes Prior to 2.5.2 release
- Fix problem with compiling with gcc-2 compilers
- Fix compile problem of post-incrmenting a variable in a macro arg.
- Stop map_dev from returning [0:0], as that breaks things.