Linux Software Raid: Difference between revisions
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*[https://raid.wiki.kernel.org/index.php/Mdstat mdstat] | *[https://raid.wiki.kernel.org/index.php/Mdstat mdstat] | ||
*[https://www.snel.com/support/how-to-use-mdadm-to-manage-software-raid-disc-arrays/ How to use MDADM to manage software RAID disc arrays] | *[https://www.snel.com/support/how-to-use-mdadm-to-manage-software-raid-disc-arrays/ How to use MDADM to manage software RAID disc arrays] | ||
*[https://www.digitalocean.com/community/tutorials/how-to-create-raid-arrays-with-mdadm-on-ubuntu-16-04 How To Manage RAID Arrays with mdadm ] | |||
*[[RAID]] | *[[RAID]] | ||
*[http://tldp.org/HOWTO/Software-RAID-HOWTO.html Software RAID Howto] | *[http://tldp.org/HOWTO/Software-RAID-HOWTO.html Software RAID Howto] | ||
Revision as of 12:30, 7 March 2023
Links
- A guide to mdadm
- mdstat
- How to use MDADM to manage software RAID disc arrays
- How To Manage RAID Arrays with mdadm
- RAID
- Software RAID Howto
- A better guide
- http://gentoo-wiki.com/HOWTO_Gentoo_Install_on_Software_RAID
- COMMON RAID DISK DATA FORMAT (DDF)
- Switching to mirroring
- http://www.sanitarium.net/golug/Linux_Software_RAID.html
FAQ
Scan devices
mdadm --examine --scan --verbose /dev/sda2 /dev/sdb2 /dev/sdc2
What the howto and man mdadm don't tell
Checking the raid units
From man md:
echo check > /sys/block/md0/md/sync_action
check /proc/mdstat for status, and then set back to idle:
echo idle > /sys/block/md0/md/sync_action
Looking at your raid units
cat /proc/mdstat mdadm --detail /dev/md0
(also shows what's going on when checking/resynching)
Hotswapping (scsi) disks
eject -s /dev/sda
