Software raid - mdadm: Difference between revisions
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Created page with "Category:Linux = Force check of a software raid = <pre> echo "check" > /sys/block/md0/md/sync_action </pre> = Force create a new raid array with no spared (in case of ex..." |
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= Force create a new raid array with no spared (in case of existing data from previos raid) = | = Force create a new raid array with no spared (in case of existing data from previos raid) = | ||
Assuming Raid 5 using 3 drives: '''sda1''' - '''sdc1''' - '''sdd1''' | Assuming Raid 5 using 3 drives: '''sda1''' - '''sdc1''' - '''sdd1''' | ||
First we overwrite the superblock | First we overwrite the superblock | ||
<pre> | <pre> | ||
Latest revision as of 09:28, 12 August 2012
Force check of a software raid
echo "check" > /sys/block/md0/md/sync_action
Force create a new raid array with no spared (in case of existing data from previos raid)
Assuming Raid 5 using 3 drives: sda1 - sdc1 - sdd1
First we overwrite the superblock
mdadm --zero-superblock /dev/sd[acd]1
Then re-create the array using the --assume-clean
mdadm --create /dev/md1 --assume-clean --verbose --level=5 --raid-devices=3 /dev/sda1 /dev/sdc1 /dev/sdd1
Possible force-check the array if needed with the above.