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Diffstat (limited to '')
-rw-r--r-- | ANNOUNCE-3.0 | 98 | ||||
-rw-r--r-- | ANNOUNCE-3.0.1 | 22 | ||||
-rw-r--r-- | ANNOUNCE-3.0.2 | 21 | ||||
-rw-r--r-- | ANNOUNCE-3.0.3 | 29 |
4 files changed, 170 insertions, 0 deletions
diff --git a/ANNOUNCE-3.0 b/ANNOUNCE-3.0 new file mode 100644 index 0000000..f2d4f84 --- /dev/null +++ b/ANNOUNCE-3.0 @@ -0,0 +1,98 @@ +Subject: ANNOUNCE: mdadm 3.0 - A tool for managing Soft RAID under Linux + +I am pleased to (finally) announce the availability of + mdadm version 3.0 + +It is available at the usual places: + countrycode=xx. + http://www.${countrycode}kernel.org/pub/linux/utils/raid/mdadm/ +and via git at + git://neil.brown.name/mdadm + http://neil.brown.name/git?p=mdadm + + +This is a major new version and as such should be treated with some +caution. However it has seen substantial testing and is considerred +to be ready for wide use. + + +The significant change which justifies the new major version number is +that mdadm can now handle metadata updates entirely in userspace. +This allows mdadm to support metadata formats that the kernel knows +nothing about. + +Currently two such metadata formats are supported: + - DDF - The SNIA standard format + - Intel Matrix - The metadata used by recent Intel ICH controlers. + +Also the approach to device names has changed significantly. + +If udev is installed on the system, mdadm will not create any devices +in /dev. Rather it allows udev to manage those devices. For this to work +as expected, the included udev rules file should be installed. + +If udev is not installed, mdadm will still create devices and symlinks +as required, and will also remove them when the array is stopped. + +mdadm now requires all devices which do not have a standard name (mdX +or md_dX) to live in the directory /dev/md/. Names in this directory +will always be created as symlinks back to the standard name in /dev. + +The man pages contain some information about the new externally managed +metadata. However see below for a more condensed overview. + +Externally managed metadata introduces the concept of a 'container'. +A container is a collection of (normally) physical devices which have +a common set of metadata. A container is assembled as an md array, but +is left 'inactive'. + +A container can contain one or more data arrays. These are composed from +slices (partitions?) of various devices in the container. + +For example, a 5 devices DDF set can container a RAID1 using the first +half of two devices, a RAID0 using the first half of the remain 3 devices, +and a RAID5 over thte second half of all 5 devices. + +A container can be created with + + mdadm --create /dev/md0 -e ddf -n5 /dev/sd[abcde] + +or "-e imsm" to use the Intel Matrix Storage Manager. + +An array can be created within a container either by giving the +container name and the only member: + + mdadm -C /dev/md1 --level raid1 -n 2 /dev/md0 + +or by listing the component devices + + mdadm -C /dev/md2 --level raid0 -n 3 /dev/sd[cde] + +To assemble a container, it is easiest just to pass each device in turn to +mdadm -I + + for i in /dev/sd[abcde] + do mdadm -I $i + done + +This will assemble the container and the components. + +Alternately the container can be assembled explicitly + + mdadm -A /dev/md0 /dev/sd[abcde] + +Then the components can all be assembled with + + mdadm -I /dev/md0 + +For each container, mdadm will start a program called "mdmon" which will +monitor the array and effect any metadata updates needed. The array is +initially assembled readonly. It is up to "mdmon" to mark the metadata +as 'dirty' and which the array to 'read-write'. + +The version 0.90 and 1.x metadata formats supported by previous +versions for mdadm are still supported and the kernel still performs +the same updates it use to. The new 'mdmon' approach is only used for +newly introduced metadata types. + +NeilBrown 2nd June 2009 diff --git a/ANNOUNCE-3.0.1 b/ANNOUNCE-3.0.1 new file mode 100644 index 0000000..91b4428 --- /dev/null +++ b/ANNOUNCE-3.0.1 @@ -0,0 +1,22 @@ +Subject: ANNOUNCE: mdadm 3.0.1 - A tool for managing Soft RAID under Linux + +I am pleased to announce the availability of + mdadm version 3.0.1 + +It is available at the usual places: + countrycode=xx. + http://www.${countrycode}kernel.org/pub/linux/utils/raid/mdadm/ +and via git at + git://neil.brown.name/mdadm + http://neil.brown.name/git?p=mdadm + + +This contains only minor bug fixes over 3.0. If you are using +3.0, you could consider upgrading. + +The brief change log is: + - Fix various segfaults + - Fixed for --examine with containers + - Lots of other little fixes. + +NeilBrown 25th September 2009 diff --git a/ANNOUNCE-3.0.2 b/ANNOUNCE-3.0.2 new file mode 100644 index 0000000..93643d1 --- /dev/null +++ b/ANNOUNCE-3.0.2 @@ -0,0 +1,21 @@ +Subject: ANNOUNCE: mdadm 3.0.2 - A tool for managing Soft RAID under Linux + +I am pleased to announce the availability of + mdadm version 3.0.2 + +It is available at the usual places: + countrycode=xx. + http://www.${countrycode}kernel.org/pub/linux/utils/raid/mdadm/ +and via git at + git://neil.brown.name/mdadm + http://neil.brown.name/git?p=mdadm + + +This just contains one bugfix over 3.0.1 - I was obviously a bit hasty +in releasing that one. + +The brief change log is: + - Fix crash when hosthost is not set, as often happens in + early boot. + +NeilBrown 25th September 2009 diff --git a/ANNOUNCE-3.0.3 b/ANNOUNCE-3.0.3 new file mode 100644 index 0000000..d6117a1 --- /dev/null +++ b/ANNOUNCE-3.0.3 @@ -0,0 +1,29 @@ +Subject: ANNOUNCE: mdadm 3.0.3 - A tool for managing Soft RAID under Linux + +I am pleased to announce the availability of + mdadm version 3.0.3 + +It is available at the usual places: + countrycode=xx. + http://www.${countrycode}kernel.org/pub/linux/utils/raid/mdadm/ +and via git at + git://neil.brown.name/mdadm + http://neil.brown.name/git?p=mdadm + + +This contains a collection of bug fixes and minor enhancements over +3.0.1. + +The brief change log is: + - Improvements for creating arrays giving just a name, like 'foo', + rather than the full '/dev/md/foo'. + - Improvements for assembling member arrays of containers. + - Improvements to test suite + - Add option to change increment for RebuildNN messages reported + by "mdadm --monitor" + - Improvements to mdmon 'hand-over' from initrd to final root. + - Handle merging of devices that have left an IMSM array and are + being re-incorporated. + - Add missing space in "--detail --brief" output. + +NeilBrown 22nd October 2009 |