Question: I have Windows 7 Pro installed in my system. Now i want to dual boot my computer with Ubuntu 12.0. How can I install Ubuntu alongside Windows 7?

For that, I think I need one more primary partition but when I run the ubuntu installation disk, I don't know where I need to install it. The disk names in ubuntu are confusing.

If I can install with wubi, how do I do? It has only two options and does not have any option to install ubuntu alongside windows.

Answer: 
The folks at this location actually mapped the serial numbers of the physical disks to separate names to help identify those in the RAID array. They used UDEV rules for it. This eliminates the guesswork since serial numbers are typically written on the disk paper labels.

In the below link you'll find real 2 drive failure on a RAID6 setup (+) and recovery. Take a look. You might be able to identify in a similar way which drive you need to unplug.

Regards,

[RAID 6 + XFS + MDADM](http://www.microdevsys.com/WordPress/2012/04/02/linux-htpc-home-backup-mdadm-raid6-lvm-xfs-cifs-and-nfs/3/)

[RAID 6 UDEV Naming](http://www.microdevsys.com/WordPress/2012/04/01/linux-persistent-naming-of-sata-devices-through-udev-rules/)
It should be something like

```
mdadm --add /dev/md3 /dev/<disk>

```

… where `<disk>` is of the form `sda1`, `sdb1`, `sdc1`, etc.