Installing Raid on Centos5.2 after linux installation

joa_ds · 01-12-2009, 07:55 AM

Hi,

first of all i am a complete linux noob, but my boos bought a 16core server and i have to install centos with a RAID6 on it.

The box came with 6 1TB drives and a 32G OS drive.

So i managed to install Centos on the 32g drive. Afterwards i read the Areca manual and i set up the raid according to the manual.

Then i thought, well ok, i boot the centos and i will be able to use my Raided HD space... WRONG!

So i went to google and i found the command lvm and there is only 30g available from the boot disk.

What do i have to do to make use of the installed raid system?

eco · 01-12-2009, 08:22 AM

The RAID will be on another 'disk'.

You might try the following command to see what disks are available:

Code:

# fdisk -l

The following might also help

Code:

# dmesg|more

Once you found it, lets say it's 'sdb',

you need to add it to LVM

Code:

# pvcreate /dev/sdb

Now soo if it's in your PV:

Code:

# pvscan

I'll stop here as you should really know what you are doing before you start playing around with LVM. You still have to add the PV to a VG and create LVs into the VG, then format the LV's and mount them....

Note also that by using the 32GB disk for your OS, you will have no redundancy. So if your drive fails, you lose the OS and all the data on that disk.

Best of luck.