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diff --git a/CHANGELOG.md b/CHANGELOG.md new file mode 100644 index 0000000..c1997ba --- /dev/null +++ b/CHANGELOG.md @@ -0,0 +1,368 @@ +# Release [mdadm-4.3](https://git.kernel.org/pub/scm/utils/mdadm/mdadm.git/log/?h=mdadm-4.3) + +Features: +- **IMSM_NO_PLATFORM** boot parameter support from Neil Brown. +- **--write-zeros** option support by Logan Gunthorpe. +- **IMSM** monetization by VMD register from Mateusz Grzonka. +- RST SATA under VMD support from Kevin Friedberg. +- Strong name rules from Mariusz Tkaczyk. + +Fixes: +- Unify failed raid behavior from Coly Li. +- Rework of **--update** options from Mateusz Kusiak. +- **mdmon-initrd** service from Neil Brown. +- **IMSM** expand functionality rework from Mariusz Tkaczyk. +- Mdmonitor improvements from Mateusz Grzonka. +- Failed state verification from Mateusz Kusiak and Kinga Tanska. + +# Release [mdadm-4.2](https://git.kernel.org/pub/scm/utils/mdadm/mdadm.git/log/?h=mdadm-4.2) + +The release includes more than two years of development and bugfixes, so it is difficult to +remember everything. Highlights include enhancements and bug fixes including for **IMSM** RAID, +Partial Parity Log, clustered RAID support, improved testing, and gcc-9 support. + +# Release [mdadm-4.1](https://git.kernel.org/pub/scm/utils/mdadm/mdadm.git/log/?h=mdadm-4.1) + +The update constitutes more than one year of enhancements and bug fixes including for **IMSM** +RAID, Partial Parity Log, clustered RAID support, improved testing, and gcc-8 support. + +# Release [mdadm-4.0](https://git.kernel.org/pub/scm/utils/mdadm/mdadm.git/log/?h=mdadm-4.0) + +The update in major version number primarily indicates this is a release by it's new maintainer. +In addition it contains a large number of fixes in particular for IMSM RAID and clustered RAID +support. In addition, this release includes support for IMSM 4k sector drives, failfast and better +documentation for journaled RAID. + +This is my first release of mdadm. Please thank Neil Brown for his previous work as maintainer and +blame me for all the bugs I caused since taking over. + +# Release [mdadm-3.4](https://git.kernel.org/pub/scm/utils/mdadm/mdadm.git/log/?h=mdadm-3.4) + +- Support for journalled RAID5/6 and clustered RAID1. This new support is probably still buggy. + Please report bugs. + +- There are also a number of fixes for **IMSM** support and an assortment of minor bug fixes. + +- I plan for this to be the last release of mdadm that I provide as I am retiring from MD and mdadm + maintenance. Jes Sorensen has volunteered to oversee mdadm for the next while. Thanks Jes! + +# Release [mdadm-3.3.4](https://git.kernel.org/pub/scm/utils/mdadm/mdadm.git/log/?h=mdadm-3.3.4) + +**I strongly recommend upgrading to 3.3.4 if you are using 3.3 or later with IMSM.** + +- **IMSM** metadata assemble fixes. + + In mdadm-3.3 a change was made to how **IMSM** metadata was handled. Previously an **IMSM** array + would only be assembled if it was attached to an **IMSM** controller. In 3.3 this was relaxed as + there are circumstances where the controller is not properly detected. Unfortunately, this has + negative consequences which have only just come to light. + + If you have an IMSM RAID1 configured and then disable RAID in the BIOS, the metadata will remain + on the devices. If you then install some other OS on one device and then install Linux on the + other, Linux might eventually start noticing the IMSM metadata (depending a bit on whether + mdadm is included in the initramfs) and might start up the RAID1. This could copy one device over + the other, thus trashing one of the installations. + + So, with this release IMSM arrays will only be assembled if attached to an **IMSM** controller, + or if **--force** is given to **--assemble**, or if the environment variable + **IMSM_NO_PLATFORM=1** is set (used primarily for testing). + +# Release [mdadm-3.3.3](https://git.kernel.org/pub/scm/utils/mdadm/mdadm.git/log/?h=mdadm-3.3.3) + +- The 100 changes since 3.3.3 are mostly little bugfixes and some improvements to the self-tests. +- raid6check now handle all RAID6 layouts including **DDF** correctly. See git log for the rest. + +# Release [mdadm-3.3.2](https://git.kernel.org/pub/scm/utils/mdadm/mdadm.git/log/?h=mdadm-3.3.2) + +- Little bugfixes and some man-page updates. + +# Release [mdadm-3.3.1](https://git.kernel.org/pub/scm/utils/mdadm/mdadm.git/log/?h=mdadm-3.3.1) + +- lots of work on **DDF** support. +- Improved interactions with **systemd**. Where possible, background tasks are run from systemd + rather than forking. +- Number of other little bug fixes too. + +# Release [mdadm-3.3](https://git.kernel.org/pub/scm/utils/mdadm/mdadm.git/log/?h=mdadm-3.3) + +- Some array reshapes can proceed without needing backup file. This is done by changing the + data_offset* so we never need to write any data back over where it was before. If there is no + 'head space' or 'tail space' to allow *data_offset* to change, the old mechanism with a backup + file can still be used. + +- RAID10 arrays can be reshaped to change the number of devices, change the chunk size, or change + the layout between *near* and *offset*. + This will always change *data_offset*, and will fail if there is no room for *data_offset* to be + moved. + +- **--assemble --update=metadata** can convert a **0.90** array to a **1.0** array. + +- **bad-block-logs** are supported (but not heavily tested yet). + +- **--assemble --update=revert-reshape** can be used to undo a reshape that has just been started + but isn't really wanted. This is very new and while it passes basic tests it cannot be + guaranteed. + +- improved locking between **--incremental** and **--assemble**. + +- uses systemd to run **mdmon** if systemd is configured to do that. +- kernel names of md devices can be non-numeric. e.g. "md_home" rather than + "md0". This will probably confuse lots of other tools, so you need to + **echo CREATE names=yes >> /etc/mdadm.conf** or the feature will not be used (you also need a + reasonably new kernel). + +- **--stop** can be given a kernel name instead of a device name. i.e. **mdadm --stop md4** will + work even if /dev/md4 doesn't exist. + +- **--detail --export** has some information about the devices in the array. +- **--dump** and **--restore** can be used to backup and restore the metadata on an array. +- Hot-replace is supported with **mdadm /dev/mdX --replace /dev/foo** and + **mdadm /dev/mdX --replace /dev/foo --with /dev/bar**. + +- Config file can be a directory in which case all "*.conf" files are read in lexical order. + Default is to read **/etc/mdadm.conf** and then **/etc/mdadm.conf.d**. Thus + **echo CREATE name=yes > /etc/mdadm.conf.d/names.conf** will also enable the use of named md + devices. + +- Lots of improvements to **DDF** support including adding support for RAID10 (thanks Martin Wilck). + +# Release [mdadm-3.2.6](https://git.kernel.org/pub/scm/utils/mdadm/mdadm.git/log/?h=mdadm-3.2.6) + +- There are no real stand-out fixes, just lots of little bits and pieces. + +# Release [mdadm-3.2.5](https://git.kernel.org/pub/scm/utils/mdadm/mdadm.git/log/?h=mdadm-3.2.5) + +- This release primarily fixes a serious regression in 3.2.4. This regression does *not* cause + any risk to data. It simply means that adding a device with **--add** would sometime fail + when it should not. +- The fix also includes a couple of minor fixes such as making the **--layout=preserve** option to + **--grow** work again. + +# Release [mdadm-3.2.4](https://git.kernel.org/pub/scm/utils/mdadm/mdadm.git/log/?h=mdadm-3.2.4) + + - **--offroot** argument to improve interactions between mdmon and initrd. + - **--prefer** argument to select which */dev* names to display in some circumstances. + - relax restrictions on when **--add** will be allowed. + - Fix bug with adding write-intent-bitmap to active array. + - Now defaults to */run/mdadm* for storing run-time files. + +# Release [mdadm-3.2.3](https://git.kernel.org/pub/scm/utils/mdadm/mdadm.git/log/?h=mdadm-3.2.3) + +- The largest single area of change is support for reshape of Intel IMSM arrays (OnLine Capacity + Expansion and Level Migration). +- Among other fixes, this now has a better chance of surviving if a device fails during reshape. + +# Release [mdadm-3.2.2](https://git.kernel.org/pub/scm/utils/mdadm/mdadm.git/log/?h=mdadm-3.2.2) + +- reshaping IMSM (Intel metadata) arrays is no longer 'experimental', it should work properly and be + largely compatible with IMSM drivers in other platforms. +- **--assume-clean** can be used with **--grow --size** to avoid resyncing the new part of the + array. This is only support with very new kernels. +- RAID0 arrays can have chunksize which is not a power of 2. This has been supported in the kernel + for a while but is only now supported by mdadm. + +- A new tool **raid6check** is available, which can check a RAID6 array, or part of it and report + which device is most inconsistent with the others if any stripe is inconsistent. This is still + under development and does not have a man page yet. If anyone tries it out and has any questions + or experience to report, they would be most welcome on linux-raid@vger.kernel.org. + +# Release [mdadm-3.2.1](https://git.kernel.org/pub/scm/utils/mdadm/mdadm.git/log/?h=mdadm-3.2.1) + +- Policy framework + + Policy can be expressed for moving spare devices between arrays, and for how to handle hot-plugged + devices. This policy can be different for devices plugged in to different controllers etc. This, + for example, allows a configuration where when a device is plugged in it is immediately included + in an md array as a hot spare and possibly starts recovery immediately if an array is degraded. + +- Some understanding of mbr and gpt paritition tables. This is primarily to support the new + hot-plug support. If a device is plugged in and policy suggests it should have a partition table, + the partition table will be copied from a suitably similar device, and then the partitions will + hot-plug and can then be added to md arrays. + +- **--incremental --remove** can remember where a device was removed from so if a device gets + plugged back in the same place, special policy applies to it, allowing it to be included in an + array even if a general hotplug will not be included. + +- Enhanced reshape options, including growing a RAID0 by converting to RAID4, restriping, and + converting back. Also convertions between RAID0 and RAID10 and between RAID1 and RAID10 are + possible (with a suitably recent kernel). + +- Spare migration for IMSM arrays. Spare migration can now work across 'containers' using + non-native metadata and specifically Intel's IMSM arrays support spare migrations. + +- OLCE and level migration for Intel IMSM arrays. OnLine Capacity Expansion and level migration + (e.g. RAID0 -> RAID5) is supported for Intel Matrix Storage Manager arrays. This support is + currently *experimental* for technical reasons. It can be enabled with + **export MDADM_EXPERIMENTAL=1**. + +- avoid including wayward devices. + + If you split a RAID1, mount the two halves as two separate degraded RAID1s, and then later bring + the two back together, it is possible that the md metadata won't properly show that one must + over-ride the other. Mdadm now does extra checking to detect this possibility and avoid + potentially corrupting data. + +- Remove any possible confusion between similar options. e.g. **--brief** and **--bitmap** were + mapped to 'b' and mdadm wouldn't notice if one was used where the other was expected. + +- Allow K,M,G suffixes on chunk sizes. + +# Release [mdadm-3.2](https://git.kernel.org/pub/scm/utils/mdadm/mdadm.git/log/?h=mdadm-3.2) + +- By far the most significant change in this release related to the management of reshaping arrays. + This code has been substantially re-written so that it can work with **externally managed + metadata** -Intel's IMSM in particular. We now support level migration and OnLine Capacity + Expansion on these arrays. + +- Various policy statements can be made in the *mdadm.conf* to guide the behavior of mdadm, + particular with regards to how new devices are treated by **--incremental**. Depending on the + *action* associated with a device (identified by its *path*) such need devices can be + automatically re-added to and existing array that they previously fell out off, or automatically + added as a spare if they appear to contain no data. + +- mdadm now has a limited understanding of partition tables. This allows the policy framework to + make decisions about partitioned devices as well. + +- **--incremental --remove** can be told what **--path** the device was on, and this info will be + recorded so that another device appearing at the same physical location can be preferentially + added to the same array (provides the spare-same-slot action policy applied to the path). + +- A new flags **--invalid-backup** flag is available in **--assemble** mode. This can be used to + re-assemble an array which was stopping in the middle of a reshape, and for which the + *backup file* is no longer available or is corrupted. The array may have some corruption in it + at the point where reshape was up to, but at least the rest of the array will become available. + +- Policy framework. +- Various internal restructuring - more is needed. + +# Release [mdadm-3.1.5](https://git.kernel.org/pub/scm/utils/mdadm/mdadm.git/log/?h=mdadm-3.1.5) + +- Fixes for **v1.x** metadata on big-endian machines. +- man page improvements. +- Improve **--detail --export** when run on partitions of an md array. +- Fix regression with removing *failed* or *detached* devices. +- Fixes for **--assemble --force** in various unusual cases. +- Allow **-Y** to mean **--export**. This was documented but not implemented. +- Various fixes for handling **ddf** metadata. This is now more reliable but could benefit from + more interoperability testing. +- Correctly list subarrays of a container in **--detail** output. +- Improve checks on whether the requested number of devices is supported by the metadata, both for + **--create** and **--grow**. +- Don't remove partitions from a device that is being included in an array until we are fully + committed to including it. +- Allow **--assemble --update=no-bitmap** so an array with a corrupt bitmap can still be assembled. +- Don't allow **--add** to succeed if it looks like a **--re-add** is probably wanted, but cannot + succeed. This avoids inadvertently turning devices into spares when an array is failed. + +# Release [mdadm-3.1.4](https://git.kernel.org/pub/scm/utils/mdadm/mdadm.git/log/?h=mdadm-3.1.4) + +Two fixes related to configs that aren't using udev: +- Don't remove md devices which 'standard' names on **--stop**. +- Allow dev_open to work on read-only */dev*. + +And fixed regressions: +- Allow **--incremental** to add spares to an array. +- Accept **--no-degraded** as a deprecated option rather than throwing an error. +- Return correct success status when **--incremental** assembling a container which does not yet + have enough devices. +- Don't link mdadm with pthreads, only mdmon needs it. +- Fix compiler warning due to bad use of snprintf. + +# Release [mdadm-3.1.3](https://git.kernel.org/pub/scm/utils/mdadm/mdadm.git/log/?h=mdadm-3.1.3) + +- mapfile now lives in a fixed location which default to */dev/.mdadm/map*, but can be changed at + compile time. This location is chosen and most distros provide it during early boot and preserve + it through. As long a */dev* exists and is writable, */dev/.mdadm* will be created. Other files + communication with mdmon live here too. This fixes a bug reported by Debian and Gentoo users where + udev would spin in early-boot. + +- IMSM and DDF metadata will not be recognized on partitions as they should only be used on + whole-disks. + +- Various overflows causes by 2G drives have been addressed. + +- A subarray of an IMSM contain can now be killed with **--kill-subarray**. Also, subarrays can be + renamed with **--update-subarray --update=name**. + +- **-If** (or **--incremental --fail**) can be used from udev to fail and remove from all arrays + a device which has been unplugged from the system i.e. hot-unplug-support. + +- **/dev/mdX --re-add missing** will look for any device that looks like it should be a member of + */dev/mdX* but isn't and will automatically **--re-add** it. + +- Now compile with *-Wextra* to get extra warnings. +- Lots of minor bug fixes, documentation improvements, etc. + +# Release [mdadm-3.1.2](https://git.kernel.org/pub/scm/utils/mdadm/mdadm.git/log/?h=mdadm-3.1.2) + +- The default metadata has change again (sorry about that). It is now **v1.2** and will hopefully + stay that way. It turned out there with boot-block issues with **v1.1** which make it unsuitable + for a default, though in many cases it is still suitable to use. + +- Add *homehost* to the valid words for the **AUTO** config file line. When followed by *-all*, + this causes mdadm to auto-assemble any array belonging to this host, but not auto-assemble + anything else. + +- VAR_RUN can be easily changed at compile time just like ALT_RUN. This gives distros more + flexibility in how to manage the pid and sock files that mdmon needs. + +- If mdadm.conf lists arrays which have inter-dependencies, the previously had to be listed in the + "right" order. Now, any order should work. + +- Fix some bugs with **--grow --chunksize=**. +- Stopping a container is not permitted when members are still active. +- Various mdmon fixes. +- Alway make bitmap 4K-aligned if at all possible. +- Fix **--force** assembly of **v1.x** arrays which are in the process of recovering. +- Add section on 'scrubbing' to 'md' man page. +- Various command-line-option parsing improvements. +- ... and lots of other bug fixes. + +# Release [mdadm-3.1.1](https://git.kernel.org/pub/scm/utils/mdadm/mdadm.git/log/?h=mdadm-3.1.1) + +- Multiple fixes for new **--grow** levels including fixes for serious data corruption + problems. +- Change default metadata to **v1.1**. +- Change default chunk size to 512K. +- Change default bitmap chunk size to 64MB. +- When **--re-add** is used, don't fall back to **--add** as this can destroy data. + +# Release [mdadm-3.1](https://git.kernel.org/pub/scm/utils/mdadm/mdadm.git/log/?h=mdadm-3.1) + +- Support **--grow** to change the layout of RAID 4/5/6. +- Support **--grow** to change the chunk size of RAID 4/5/6. +- Support **--grow** to change level from RAID1 -> RAID5 -> RAID6 and back. +- Support **--grow** to reduce the number of devices in RAID 4/5/6. +- Support restart of these grow options which assembling an array which is partially grown. +- Assorted tests of this code, and of different RAID6 layouts. + +# Release [mdadm-3.0.3](https://git.kernel.org/pub/scm/utils/mdadm/mdadm.git/log/?h=mdadm-3.0.3) + +- 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 **--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. + +# Release [mdadm-3.0.2](https://git.kernel.org/pub/scm/utils/mdadm/mdadm.git/log/?h=mdadm-3.0.2) + +- Fix crash when **homehost** is not set, as often happens in early boot. + +# Release [mdadm-3.0.1](https://git.kernel.org/pub/scm/utils/mdadm/mdadm.git/log/?h=mdadm-3.0.1) + +- Fix various segfaults. +- Fixed for **--examine** with containers. +- Lots of other little fixes. + +# Release [mdadm-3.0](https://git.kernel.org/pub/scm/utils/mdadm/mdadm.git/log/?h=mdadm-3.0) + +- Support for **externally managed metadata**, specifically DDF and IMSM. +- Depend on udev to create entries in */dev*, rather than creating them ourselves. +- Remove **--auto-update-home-hosts**. +- New config file line **auto**. +- New *ignore* and *any* options for **homehost**. +- Numerous bug fixes and minor enhancements. |