Saturday, February 27, 2010

Creating RAID device

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3. Create RAID device


Here we will create and format the RAID device. We will assume that we are using RAID 5 configuration, as described in step 2, where we have defined device file to be /dev/md2. Now we will create the file and then format it. The commands for this step will be as follows:


# mkraid -R /dev/md2

# mkfs -j /dev/md2


Note : The mkraid command will delete all data from all the associated partitions.


4. Mounting RAID device


Lastly, we will have to mount the file system on this partition:


# mkdir /my_raid

# mount /dev/md2 /my_raid


Else, if we want to mount /home on our new RAID device, we can run following commands:


# mkdir /temp_home

# cp -r /home /temp_home ( recursively copying, i.e. backing up home directory )

# mount /dev/md2 /home

# cp -r /temp_home /home


If we want it to be mounted automatically each time the system starts, add the following entry in /etc/fstab file:


LABEL=/home /home ext3 defaults 1 2


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