Difference between revisions of "Package:Mdadm"

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(adding mdadm to boot sequence)
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Configuring mdadm is done via the {{f|/etc/mdadm.conf}} file. By default, after installation this file is entirely commented out. One may remove the comment hash <code>#</code> in front of the line that most suits the RAID in use and alter the line to point to the correct devices, or add a new line, based on the examples given.
 
Configuring mdadm is done via the {{f|/etc/mdadm.conf}} file. By default, after installation this file is entirely commented out. One may remove the comment hash <code>#</code> in front of the line that most suits the RAID in use and alter the line to point to the correct devices, or add a new line, based on the examples given.
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To start mdadm at boot, add it to the default runtime level:
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{{console|body=
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###i## rc-udate add mdadm default
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}}
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Not doing so results in a broken or unbootable system.
  
 
{{tip|If you're upgrading an existing system to Funtoo, backup the existing <code>/etc/mdadm.conf</code> file to a secure location and copy it back prior to rebooting into the new install.}}
 
{{tip|If you're upgrading an existing system to Funtoo, backup the existing <code>/etc/mdadm.conf</code> file to a secure location and copy it back prior to rebooting into the new install.}}

Revision as of 00:10, March 3, 2016

Mdadm

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The mdadm tool manages MD devices, such as Linux Software RAID.

Installation

   Note

In most cases the package is pulled in during the kernel installation as a dependency when a RAID is present.

root # emerge mdadm

Configuration

Configuring mdadm is done via the /etc/mdadm.conf file. By default, after installation this file is entirely commented out. One may remove the comment hash # in front of the line that most suits the RAID in use and alter the line to point to the correct devices, or add a new line, based on the examples given.

To start mdadm at boot, add it to the default runtime level:

root # rc-udate add mdadm default

Not doing so results in a broken or unbootable system.

   Tip

If you're upgrading an existing system to Funtoo, backup the existing /etc/mdadm.conf file to a secure location and copy it back prior to rebooting into the new install.

   Tip

mdadm can be very tricky to administer for novices. Install Webmin and use its webinterface to create and use a new RAID.