...
In the following examples we are going to use sdb and sdc for the disc to use in the RAID. Adapt it to your situation.
Create the partitions
| Code Block |
|---|
fdisk /dev/sdb |
- p check the partition table
- n create partition (ex +128M)
- t filesystem
- a bootflag
- w write
Set the RAID1 system on the 2 partitions
| Code Block |
|---|
mdadm --create /dev/md0 --level=1 --raid-devices=2 /dev/sdb1 /dev/sdc1 |
...
mdadm --create /dev/md1 --level=1 --raid-devices=2 /dev/sdb2 /dev/sdc2 |
Check the RAID-DEVICES
| Code Block |
|---|
cat /proc/mdstat |
...
Make the file system
| Code Block |
|---|
mkfs.ext3 /dev/md0 |
...
mkfs.ext4 /dev/md1 |
...
Mount the disks
| Code Block |
|---|
mkdir /mnt/md0 |
...
mkdir /mnt/md1 |
...
mount /dev/md0 /mnt/md0/ |
...
mount /dev/md1 /mnt/md1/ |
...
Copy the data of Home
| Code Block |
|---|
cd /home |
...
tar c * | tar x -C /mnt/md1 |
Find the UUID of the 1st partition
| Code Block |
|---|
blkid |
...
/dev/md1: UUID="3968404e-6571-4671-a157-9113a9f2fcba" TYPE="ext4" |
...
Make md1 be the home directory
| Code Block |
|---|
emacs /etc/fstab |
...
# /home was on /dev/sda9 during installation |
...
UUID=3968404e-6571-4671-a157-9113a9f2fcba /home ext3 defaults 0 2 |
...
|
Add new Hard drive
Connect the new hard disk and boot a system.
...
(Assuming that /dev/sda is the existing working drive and /dev/sdb is the newly added drive){
| Code Block |
|---|
...
dd if=/dev/sda of=mbr.bin bs=512 count=1 |
...
dd if=mbr.bin of=/dev/sdb bs=512 count=1 |
{code}
Now, check Check the status of the RAID devices to see the device numbers{
| Code Block |
|---|
...
cat /proc/mdstat |
{code}
Now, add Add the appropriate partition of the new drive to the RAID devices, repeat for each RAID device.{
| Code Block |
|---|
...
mdadm --manage --add /dev/md0 /dev/sdb1 |
...
Start the arrays at once
Some linux system integrated an mdadm tool called mdadm-startall. You can install it if not already done.
It doesn't require any argument and will assemble all the md drives found.
| Code Block |
|---|
mdadm-startall |