I want to create a bootable backup image/clone of my centos7 server "A" having software raid partitions and use this backup to create new servers with same configurations.
my partitions are
sda --> sda1 ----> md120 / --> sda2 ----> md121 swap --> sda3 ----> md122 /boot --> sda4 ----> md123 /var/images sdb --> sdb1 ----> md120 / --> sdb2 ----> md121 swap --> sdb3 ----> md122 /boot --> sdb4 ----> md123 /var/images sdc
I have used dd command to take backup of sda parttion (containing boot and swap, root and /var/images )
dd if=/dev/sda of=/dev/sdc bs=512 conv=noerror,sync
but when i restore the image on another server "B" (bare metal with same configuration) sda partition.
I was hoping that i will automatically boot up the server and raid sync will start on the other sdb drive.
But unfortunately it is not working.
Could anyone please suggest me the way to take backup of software raid partitions. And do i need to take backup of both drive ?