Difference between revisions of "Mdadm"

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= Create =
 
= Create =
 
  mdadm --create --verbose /dev/md0 --level=0 --raid-devices=2 /dev/sdh /dev/sdi
 
  mdadm --create --verbose /dev/md0 --level=0 --raid-devices=2 /dev/sdh /dev/sdi
 +
 +
= Assemble =
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# mdadm --assemble --scan
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mdadm: /dev/md/0 has been started with 2 drives.
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= Store configuration =
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You can store your mdadm configuration like this:
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mdadm --detail --scan >/etc/mdadm.conf
  
 
= Monitor =
 
= Monitor =
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= See also =
 
= See also =
* [http://man-wiki.net/index.php/8:mdadm mdadm's man page]
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* [http://linux.die.net/man/8/mdadm mdadm's man page]
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* http://www.ducea.com/2009/03/08/mdadm-cheat-sheet/
  
 
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Latest revision as of 09:42, 22 April 2014

mdadm is a tool to create and manage software RAID. It allows you to

  • create a (new) software raid array. Think of two USB hard drives that you just bought and that you want to use in a RAID 1 configuration.
  • assemble an (existing) array. Think of two USB hard drives that you have in your shelve and that you have already made to a RAID array using the create command. When you re-attach them to your computer, you need to tell the computer how the disks belong together (RAID 0 or RAID 1 for example). That is what the assemble command is for.

Create

mdadm --create --verbose /dev/md0 --level=0 --raid-devices=2 /dev/sdh /dev/sdi

Assemble

# mdadm --assemble --scan
mdadm: /dev/md/0 has been started with 2 drives.

Store configuration

You can store your mdadm configuration like this:

mdadm --detail --scan >/etc/mdadm.conf 

Monitor

Monitor your raid's status with the command

cat /proc/mdstat

See also


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