Why there are two recovery partitions?, Why there are two recovery partitions?

You might have 2 Recovery HDs because:

1 - Two OS Xs were installed into separate partitions (e.g. OS X Lion in one and OS X Mavericks in the other).

2 - If you use Carbon Copy Cloner (CCC), maybe you added a Recovery HD to your HDD2-2 volume from CCC in error.

It should be easy enough to do what you want to do. You can use Disk Utility to mount your 2nd Recovery HD then delete it and delete your HDD2-2 volume.

To display ALL your partitions via Disk Utility, open Terminal and type: defaults write com.apple.DiskUtility DUDebugMenuEnabled 1. Then launch Disk Utility and you should see a Debug menu item in the menu bar. Click on Debug then select Show All Partitions. Now you can mount the second Recovery HD (disk0s5) and delete it. Once you delete the HDD2-2 and extra Recovery HD, resize your Macintosh HD21 to take all the free space.

Can you show me a screen print of what you're seeing in Disk Utility?

Ok try this:

Select your disk drive like your 1st screenshot. Then click on the Partition tab. Select the 2nd Recovery HD and click on the '-' to delete it (bottom left of all the partitions). If it works, you should see some free space at the end of HDD2-2. Show another screenshot.

Ok then. I believe you mentioned in your 1st post you know you need to delete your HDD2-2 partition so you only have one (Macintosh-HD21) so you can install BootCamp. If you have a back up of your HDD2-2 partition, go ahead and select it then click the '-' sign to delete it. If it works you should have free space underneath Macintosh HD21. Show another screenshot, please.

Hang on... you still need to do the back up at some point but you can cancel it and do the following if you want or wait until your back up is completed. It's up to you.

You want to keep the HDD2-2 partition and just split it into a 3rd, right? If so, you can delete the extra Recovery HD another way.

Open Terminal from /Applications/Utilities.

Type diskutil list. You should see the same layout as what you have in your 1st post. If not STOP HERE and show me your diskutil list. Otherwise, type diskutil eraseVolume HFS+ ErasedDisk /dev/disk0s5 <---- this will erase the Recovery HD and rename it.

Do another diskutil list and disk0s5 should now show as ErasedDisk.

Now type diskutil mergePartitions HFS+ MacHD disk0s4 disk0s5 <--- this will merge ErasedDisk into HDD2-2.

Type diskutil list again. You should not see the 2nd Recovery HD. Now you can do whatever you wanted to do with HDD2-2 and BootCamp.

But DO A BACK UP of HDD2-2 before you work with BootCamp just to be on the safe side so you don't lose that data.

You can't merge them. You will have to delete HDD2-2 which will produce free space then grab the lower right corner of Macintosh HD21 and drag it down to fill in the whole partition so you have 1 partition.

Open Disk Utility.

Click on your drive name (1TB WDC WD.....) not the Macintosh HD21.

Click on the Partition tab.

Select HDD2-2 and click the '-' sign in the lower left corner of Disk Utility.

After you delete that partition you will see free space.

Drag the lower right corner of Macintosh HD21 to the bottom of the partition chart.

Click Apply which will give you 1 partition.

I'm sorry, but I can't help you with BootCamp. I have never used it.

You might want to start by searching for a BootCamp user manual or guide from Apple Support.