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Configuring your Environment for Software RAID
Creating a Multiple Disk Device
Chapter 3 73
2. Assemble the MD device on the other node by running the following
command:
# mdadm -A -R /dev/md0 /dev/hpdev/sde1 /dev/hpdev/sdf1
3. Stop the MD device on the other node by running the following
command:
# mdadm -S /dev/md0
You must stop the MD device soon after you assemble it on the
second node.
4. If you want to create volume groups, restart the MD device on the
first node by running the following command:
# mdadm -A -R /dev/md0 /dev/hpdev/sde1 /dev/hpdev/sdf1
5. After you have created the volume groups, stop the MD device by
running the following command:
# mdadm -S /dev/md0
IMPORTANT You would need to repeat this procedure to create all MD devices that are
used in a package.
When data is written to this device, the MD driver writes to both the
underlying disks. In case of read requests, the MD reads from one device
or the other based on its algorithms. After creating this device you treat
it like any other LUN that is going to have shared data in a Serviceguard
environment and then create a logical volume and a file system on it.