Please note the following setup is Centos 6.6.
I have an existing RAID 1 setup using 2x480GB SSD's. I Just had two new 800GB SSD's installed into the server. The existing RAID 1 setup i want to extend is mapped to
/dev/md2 points to my
/home directory at the moment. My existing
/home directory is getting full. I want to extend the size of it from
460 GB (existing
1260 GB (existing
/dev/md2 + two new drives)
The new disks are setup as
/dev/sdd. The old disks are
I found a few different guides about extending RAID setups but I am confused if this will work since I am adding different sized disks to the setup. I also am not sure if this will play nice since I want to add two disks to the setup instead of just 1.
An example of a guide I found: http://www.tecmint.com/grow-raid-array-in-linux/
Would I just run:
mdadm --manage /dev/md2 --add /dev/XXX
Two times for each of the disks before running:
mdadm --grow --raid-devices=4 /dev/md2
Would this properly setup the new 800GB SSD's to work in existence with the 480GB drives that are setup in RAID 1? Will Linux know to properly duplicate data across the new drives and not interfere with the existing drives?
EDIT: I need to do this all live. Forgot to mention that.