Malin Freeborn
ba8026e0c3
input examples are now given as ```bash input $ARG1 ``` While outputs use md's '> ' sign as a quote.
900 B
900 B
| title | tags | ||
|---|---|---|---|
| mdadm |
|
RAID5
You will need 4 disks and the mdadm package.
The total size will be equal to the disks x 3, because one will be used for redundancy.
sudo mdadm --create --verbose /dev/*md127* --level=5 --raid-devices=*4* */dev/sdb /dev/sdc /dev/sdd /dev/sde*
Note the variable parts:
- The name of the device could be
/dev/md12or whatever - The number of devices could be larger, but must be at least 4 for raid 5
- We end by listing all devices in the new
mddevice.
Now look at how the raid status:
cat /proc/mdstat
This will increase until the entire thing is fine.
Check the health of your mdadm array:
sudo mdadm --detail /dev/md127
You should see State : clean. If you see it is degraded, then a disk has broken.
Replacing a Disk
sudo mdadm --add /dev/md127 /dev/sdb1