Migration to RAID1

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Partition migration table

SWAP	sda1	md0
VAR	sda2	md1
ROOT	sda3	md2
TMP	sda5	md3
HOME	sda6	md4
MYSQL	sdb7	md5

Move MySQL to SDA

/etc/init.d/mysql stop
# Kill by PID if fails

rsync -avz --progress /mysql2/ /mysql1/

rm /home/www/mysql
ln -s /mysql1 /home/www/mysql

/etc/init.d/mysql start

umount /mysql2

# Remove /mysql2 from /etc/fstab

Change partition's system id

# t --> change a partition's system id
# p --> print (print and recheck before writing!!!)
# w --> write

fdisk /dev/sdb
t
1
fd
t
2
fd
t
3
fd
t
5
fd
t
6
fd
t
7
fd
p
w

Add SDB to RAID1

mdadm --create /dev/md0 --level=1 --raid-disks=2 missing /dev/sdb1
mdadm --create /dev/md1 --level=1 --raid-disks=2 missing /dev/sdb2
mdadm --create /dev/md2 --level=1 --raid-disks=2 missing /dev/sdb3
mdadm --create /dev/md3 --level=1 --raid-disks=2 missing /dev/sdb5
mdadm --create /dev/md4 --level=1 --raid-disks=2 missing /dev/sdb6
mdadm --create /dev/md5 --level=1 --raid-disks=2 missing /dev/sdb7

Create file system on RAID1

mkswap /dev/md0
mkfs.ext3 -O dir_index /dev/md1
mkfs.ext3 -O dir_index /dev/md2
mkfs.ext3 -O dir_index /dev/md3
mkfs.ext3 -O dir_index /dev/md4
mkfs.ext3 -O dir_index /dev/md5