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mdadm
Original author(s)
Neil Brown
Developer(s)
Community contributors, Mariusz Tkaczyk[1]
Initial release
2001
Stable release
4.3[2]
/ February 15, 2024; 3 months ago (2024-02-15)
Repository
github.com/md-raid-utilities/mdadm/
Written in
C
Operating system
Linux
Available in
English
Type
Disk utility
License
GNU GPL
Website
raid.wiki.kernel.org
mdadm is a Linux utility used to manage and monitor software RAID devices. It is used in modern Linux distributions in place of older software RAID utilities such as raidtools2 or raidtools.[3][4][5]
mdadm is free software originally[6] maintained by, and copyrighted to, Neil Brown of SUSE, and licensed under the terms of version 2 or later of the GNU General Public License.
^Bresnahan, Christine; Blum, Richard (2016). LPIC-2: Linux Professional Institute Certification Study Guide. John Wiley & Sons. pp. 206–221. ISBN 9781119150817.
^Vadala, Derek (2003). Managing RAID on Linux. O'Reilly Media, Inc. p. 140. ISBN 9781565927308. mdadm linux.
^Nemeth, Evi (2011). UNIX and Linux System Administration Handbook. Pearson Education. pp. 242–245. ISBN 9780131480056.
^"Mdadm". Archived from the original on 2013-05-03. Retrieved 2007-08-25.
mdadm is a Linux utility used to manage and monitor software RAID devices. It is used in modern Linux distributions in place of older software RAID utilities...
drive mkdir or md, "make directory" command Multiple device, as in Linux mdadm device driver Sega Genesis or Mega Drive, a video game console Mean absolute...
mapper, with dmraid tool, for RAID 0, 1 and 10. And Linux MD RAID, with mdadm tool, for RAID 0, 1, 10, and 5. Set up of the RAID volumes must be done...
Hardware RAID systems use an onboard nonvolatile cache for this purpose. mdadm can use a dedicated journaling device (to avoid performance penalty, typically...
disk arrays, or in software within the operating system (such as Linux mdadm and device mapper). Additionally, file systems like Btrfs or ZFS provide...
(FreeBSD/OpenBSD/NetBSD) Yes No Cramfs Yes No IBM JFS2 Yes No Linux RAID (mdadm) Yes No Linux Swap 1 and 2 Yes No LVM and LVM2 Yes No Novell Storage Services...
programs have had to resort to trickery, such as using /dev/.udev, /dev/.mdadm, /dev/.systemd or /dev/.mount directories, even though the device directory...
first: fsck /usr The following example checks the Linux JFS file system on a mdadm software RAID device: fsck -t jfs /dev/md0 List of Unix commands List of...
ext4 file system". Red Hat. 9 October 2014. Retrieved 8 February 2015. "mdadm(8) – Linux man page". linux.die.net. Retrieved 8 February 2015. "Linux kernel...
format that is compatible with the mdraid subsystem in the Linux kernel. The mdadm command-line utility is a part of the mdraid subsystem. "Common RAID Disk...
pseudo-hardware controller, not a true hardware RAID controller. Linux mdadm simply holds and lets the drive complete its recovery – however, the default...
Global Information
