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mdadm - The mdadm program controls Linux md devices (software RAID arrays)

The mdadm program is used to create, manage, and monitor Linux MD (software RAID) devices. As such, it provides similar functionality to the raidtools package. However, mdadm is a single program, and it can perform almost all functions without a configuration file, though a configuration file can be used to help with some common tasks.
4.1
Arch iconArch rolling
CentOS iconCentOS 7.7.1908
Debian iconDebian 10.0
Fedora iconFedora 29
Fedora iconFedora 30
Fedora iconFedora 31
Fedora iconFedora rawhide
OpenSUSE iconOpenSUSE Leap 15.1
OpenSUSE iconOpenSUSE Leap 15.2
OpenSUSE iconOpenSUSE Tumbleweed
Ubuntu iconUbuntu 18.04 LTS
Ubuntu iconUbuntu 18.10
Ubuntu iconUbuntu 19.04
Ubuntu iconUbuntu 19.10
Ubuntu iconUbuntu 20.04
4.0
Fedora iconFedora 28
Manjaro iconManjaro rolling
OpenSUSE iconOpenSUSE Leap 15.0
OpenSUSE iconOpenSUSE Leap 42.3
Ubuntu iconUbuntu 17.10
Ubuntu iconUbuntu 18.04 LTS
3.4
Debian iconDebian 9.0
3.3
Ubuntu iconUbuntu 16.04 LTS
DistributionVersionSincePackageInstalledPackager
Arch iconArch rolling core/osxz4.1-22019-11-18343 kiB972 kiB
CentOS iconCentOS 7.7.1908 osrpm4.1-1.el72020-01-07435 kiB1.02 MiBCentOS BuildSystem
Debian iconDebian 10.0 buster/maindeb4.1-12019-02-06439 kiB1.18 MiB
Debian iconDebian 9.0 stretch/maindeb3.4-4+b12017-11-10420 kiB1.12 MiB
Fedora iconFedora 28 releases/Everything-osrpm4.0-5.fc272019-01-14428 kiB996 kiBFedora Project
Fedora iconFedora 28 releases/Server-osrpm4.0-5.fc272019-01-14428 kiB996 kiBFedora Project
Fedora iconFedora 28 releases/Workstation-osrpm4.0-5.fc272019-01-14428 kiB996 kiBFedora Project
Fedora iconFedora 29 releases/Everything-osrpm4.1-rc2.0.2.fc292019-01-14393 kiB1.03 MiBFedora Project
Fedora iconFedora 29 releases/Server-osrpm4.1-rc2.0.2.fc292019-01-14393 kiB1.03 MiBFedora Project
Fedora iconFedora 29 releases/Workstation-osrpm4.1-rc2.0.2.fc292019-01-14393 kiB1.03 MiBFedora Project
Fedora iconFedora 29 releases-test/Everything-osrpm4.1-rc2.0.2.fc292019-01-14393 kiB1.03 MiBFedora Project
Fedora iconFedora 29 releases-test/Server-osrpm4.1-rc2.0.2.fc292019-01-14393 kiB1.03 MiBFedora Project
Fedora iconFedora 29 releases-test/Workstation-osrpm4.1-rc2.0.2.fc292019-01-14393 kiB1.03 MiBFedora Project
Fedora iconFedora 30 releases/Everything-osrpm4.1-rc2.0.3.fc302019-06-17391 kiB1.13 MiBFedora Project
Fedora iconFedora 30 releases/Server-osrpm4.1-rc2.0.3.fc302019-06-17391 kiB1.13 MiBFedora Project
Fedora iconFedora 30 releases/Workstation-osrpm4.1-rc2.0.3.fc302019-06-17391 kiB1.13 MiBFedora Project
Fedora iconFedora 30 releases-test/Server-osrpm4.1-rc2.0.2.fc302019-06-17393 kiB1.03 MiBFedora Project
Fedora iconFedora 30 releases-test/Workstation-osrpm4.1-rc2.0.2.fc302019-06-17393 kiB1.03 MiBFedora Project
Fedora iconFedora 31 releases/Everything-osrpm4.1-rc2.0.5.fc31.12020-01-07411 kiB1.04 MiBFedora Project
Fedora iconFedora 31 releases/Server-osrpm4.1-rc2.0.5.fc31.12020-01-07411 kiB1.04 MiBFedora Project
Fedora iconFedora rawhide development/Everything-osrpm4.1-4.fc332020-03-10407 kiB1.01 MiBFedora Project
Fedora iconFedora rawhide development/Server-osrpm4.1-4.fc332020-03-10407 kiB1.01 MiBFedora Project
Fedora iconFedora rawhide development/Workstation-osrpm4.1-rc2.0.5.fc31.12019-08-03411 kiB1.04 MiBFedora Project
Manjaro iconManjaro rolling stable/corexz4.0-22019-01-14414 kiB1.19 MiB
Manjaro iconManjaro rolling testing/corexz4.0-22019-01-14414 kiB1.19 MiB
Manjaro iconManjaro rolling unstable/corexz4.0-22019-01-14414 kiB1.19 MiB
OpenSUSE iconOpenSUSE Leap 15.0 ossrpm4.0-lp150.7.12019-01-17452 kiB1.2 MiBhttps://bugs.opensuse.org
OpenSUSE iconOpenSUSE Leap 15.0 update/ossrpm4.0-lp150.8.6.12019-10-21439 kiB1.2 MiBhttp://bugs.opensuse.org
OpenSUSE iconOpenSUSE Leap 15.0 update/ossrpm4.0-lp150.8.3.12019-06-17454 kiB1.2 MiBhttp://bugs.opensuse.org
OpenSUSE iconOpenSUSE Leap 15.1 ossrpm4.1-lp151.3.12019-04-09453 kiB1.21 MiBhttps://bugs.opensuse.org
OpenSUSE iconOpenSUSE Leap 15.1 update/ossrpm4.1-lp151.4.6.12019-12-09454 kiB1.21 MiBhttp://bugs.opensuse.org
OpenSUSE iconOpenSUSE Leap 15.1 update/ossrpm4.1-lp151.4.3.12019-10-21454 kiB1.21 MiBhttp://bugs.opensuse.org
OpenSUSE iconOpenSUSE Leap 15.2 ossrpm4.1-lp152.5.12020-01-07453 kiB1.21 MiBhttps://bugs.opensuse.org
OpenSUSE iconOpenSUSE Leap 42.3 ossrpm4.0-4.12019-01-17436 kiB1.15 MiBhttp://bugs.opensuse.org
OpenSUSE iconOpenSUSE Leap 42.3 update/ossrpm4.0-5.9.12019-01-21438 kiB1.15 MiBhttp://bugs.opensuse.org
OpenSUSE iconOpenSUSE Leap 42.3 update/ossrpm4.0-5.6.12019-01-21438 kiB1.15 MiBhttp://bugs.opensuse.org
OpenSUSE iconOpenSUSE Leap 42.3 update/ossrpm4.0-5.3.12019-01-21437 kiB1.15 MiBhttp://bugs.opensuse.org
OpenSUSE iconOpenSUSE Leap 42.3 update/ossrpm4.0-5.15.12019-06-17439 kiB1.15 MiBhttp://bugs.opensuse.org
OpenSUSE iconOpenSUSE Leap 42.3 update/ossrpm4.0-5.12.12019-04-05439 kiB1.15 MiBhttp://bugs.opensuse.org
OpenSUSE iconOpenSUSE Tumbleweed ossrpm4.1-5.12020-02-20438 kiB1.12 MiBhttps://bugs.opensuse.org
Ubuntu iconUbuntu 17.10 artful/maindeb4.0-22017-11-10400 kiB1.14 MiB
Ubuntu iconUbuntu 18.04 LTS bionic/maindeb4.0-2ubuntu12018-06-12398 kiB1.14 MiB
Ubuntu iconUbuntu 18.04 LTS bionic-updates/maindeb4.1~rc1-3~ubuntu18.04.42020-02-03406 kiB1.18 MiB
Ubuntu iconUbuntu 18.10 cosmic/maindeb4.1~rc1-4ubuntu12019-01-14408 kiB1.19 MiB
Ubuntu iconUbuntu 18.10 cosmic-updates/maindeb4.1~rc1-4ubuntu1.12019-06-17409 kiB1.19 MiB
Ubuntu iconUbuntu 19.04 disco/maindeb4.1-1ubuntu12019-01-21409 kiB1.2 MiB
Ubuntu iconUbuntu 19.04 disco-proposed/maindeb4.1-1ubuntu1.12019-12-06411 kiB1.21 MiB
Ubuntu iconUbuntu 19.10 eoan/maindeb4.1-2ubuntu32019-06-19409 kiB1.2 MiB
Ubuntu iconUbuntu 19.10 eoan-updates/maindeb4.1-2ubuntu3.22020-02-03406 kiB1.19 MiB
Ubuntu iconUbuntu 20.04 focal/maindeb4.1-5ubuntu12020-01-24406 kiB1.19 MiB
Ubuntu iconUbuntu 16.04 LTS xenial/maindeb3.3-2ubuntu72017-11-10385 kiB1.14 MiB
Ubuntu iconUbuntu 16.04 LTS xenial-updates/maindeb3.3-2ubuntu7.62017-11-16385 kiB1.15 MiB

Manual pages

md(4)

md - Multiple Device driver aka Linux Software RAID

mdadm.conf(5)

mdadm.conf - configuration for management of Software RAID with mdadm

mdadm(8)

mdadm - manage MD devices aka Linux Software RAID

mdmon(8)

mdmon - monitor MD external metadata arrays

Latest updates

Fedora icon

Fedora rawhide development/Server-os: Updated from 4.1-3.fc32 to 4.1-4.fc33

2020-03-10
  • Fix install location of udev rules (rhbz 1809117)
Fedora icon

Fedora rawhide development/Everything-os: Updated from 4.1-3.fc32 to 4.1-4.fc33

2020-03-10
  • Fix install location of udev rules (rhbz 1809117)
OpenSUSE icon

OpenSUSE Tumbleweed oss: Updated from 4.1-4.1 to 4.1-5.1

2020-02-20
  • Create: add support for RAID0 layouts. (bsc#1162479) 0015-Create-add-support-for-RAID0-layouts.patch
  • Assemble: add support for RAID0 layouts. (bsc#1162479) 0016-Assemble-add-support-for-RAID0-layouts.patch
  • mdadm.8: add note information for raid0 growing operation
    (bsc#1129900)
    1002-mdadm.8-add-note-information-for-raid0-growing-opera.patch
Ubuntu icon

Ubuntu 18.04 LTS bionic-proposed/main: Version 4.1~rc1-3~ubuntu18.04.4 removed

2020-02-11
Ubuntu icon

Ubuntu 19.10 eoan-proposed/main: Version 4.1-2ubuntu3.2 removed

2020-02-11
Fedora icon

Fedora rawhide development/Server-os: Updated from 4.1-2.fc32 to 4.1-3.fc32

2020-02-10
  • Replace raid-check cron job with systemd timer
Fedora icon

Fedora rawhide development/Everything-os: Updated from 4.1-2.fc32 to 4.1-3.fc32

2020-02-10
  • Replace raid-check cron job with systemd timer
Fedora icon

Fedora rawhide development/Server-os: Updated from 4.1-1.fc32 to 4.1-2.fc32

2020-02-08
Fedora icon

Fedora rawhide development/Everything-os: Updated from 4.1-1.fc32 to 4.1-2.fc32

2020-02-08
Ubuntu icon

Ubuntu 18.04 LTS bionic-updates/main: Updated from 4.1~rc1-3~ubuntu18.04.2 to 4.1~rc1-3~ubuntu18.04.4

2020-02-03
  • Introduce "broken" state for RAID0/Linear in mdadm (LP: #1847924)
    • d/p/lp1847924-Introduce-new-array-state-broken-for-raid0.patch
    • Disable patches from proposed version 4.1~rc1-3~ubuntu18.04.3 due to issues with kernel
Ubuntu icon

Ubuntu 19.10 eoan-updates/main: Version 4.1-2ubuntu3.2 introduced

2020-02-03
  • Introduce "broken" state for RAID0/Linear in mdadm (LP: #1847924)
    • d/p/lp1847924-Introduce-new-array-state-broken-for-raid0.patch
    • Disable patches from proposed version 4.1-2ubuntu3.1 due to issues with kernel
Ubuntu icon

Ubuntu 20.04 focal/main: Updated from 4.1-4ubuntu1 to 4.1-5ubuntu1

2020-01-24
Ubuntu icon

Ubuntu 20.04 focal-proposed/main: Version 4.1-5ubuntu1 removed

2020-01-24
Ubuntu icon

Ubuntu 20.04 focal-proposed/main: Version 4.1-5ubuntu1 introduced

2020-01-23
Ubuntu icon

Ubuntu 19.10 eoan-proposed/main: Updated from 4.1-2ubuntu3.1 to 4.1-2ubuntu3.2

2020-01-21
  • Introduce "broken" state for RAID0/Linear in mdadm (LP: #1847924)
    • d/p/lp1847924-Introduce-new-array-state-broken-for-raid0.patch
    • Disable patches from proposed version 4.1-2ubuntu3.1 due to issues with kernel
Ubuntu icon

Ubuntu 18.04 LTS bionic-proposed/main: Updated from 4.1~rc1-3~ubuntu18.04.3 to 4.1~rc1-3~ubuntu18.04.4

2020-01-21
  • Introduce "broken" state for RAID0/Linear in mdadm (LP: #1847924)
    • d/p/lp1847924-Introduce-new-array-state-broken-for-raid0.patch
    • Disable patches from proposed version 4.1~rc1-3~ubuntu18.04.3 due to issues with kernel
Fedora icon

Fedora rawhide development/Everything-os: Updated from 4.1-rc2.0.5.fc32.2 to 4.1-1.fc32

2020-01-16
  • Update to 4.1 GA
  • Spec cleanups and updates
  • Update mdadm.pid location (rhbz 1701114, rhbz 1557623, rhbz 1557623)
Fedora icon

Fedora rawhide development/Server-os: Updated from 4.1-rc2.0.5.fc32.2 to 4.1-1.fc32

2020-01-16
  • Update to 4.1 GA
  • Spec cleanups and updates
  • Update mdadm.pid location (rhbz 1701114, rhbz 1557623, rhbz 1557623)
Fedora icon

Fedora rawhide development/Everything-os: Updated from 4.1-rc2.0.5.fc31.1 to 4.1-rc2.0.5.fc32.2

2020-01-09
  • Update tmpfiles directory to non-legacy location
  • Resolves bz1704517
Fedora icon

Fedora rawhide development/Server-os: Updated from 4.1-rc2.0.5.fc31.1 to 4.1-rc2.0.5.fc32.2

2020-01-09
  • Update tmpfiles directory to non-legacy location
  • Resolves bz1704517

Related packages

mdadm-debuginfo - Debug information for package mdadm
mdadm-debugsource - Debug sources for package mdadm
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