Two El Capitan clones ? on one USB Drive

[churin]

I cloned an installed El Capitan onto an external USB drive. The boot manager now displays two new boot drives either one of which boots to the original OS X.
The machine is Macbook with El Capitan and Windows 10 is installed by using Boot Camp.
I wonder what I did wrong. How can I get rid of one of the two identical drives on the disk manager list?

 

[pigoo3]

I'm confused. You mentioned cloning this drive…if this external drive is attached…you should be seeing two bootable drives. Are you seeing 2 bootable drives or 4? If 4…are you sure you're not getting confused by the recovery partition on each drive?

Each drive should have at least 2 bootable partitions. The "Main" bootable partition & the bootable "Recovery Partition".

- Nick

 

[churin]

The following shows two additional drives with the external USB drive connected to the Macbook.

 

[ferrarr]

What does Disk Utility show? Your image does not show how they are connected to your mac. Usually, there is either a USB or Firewire or Thunderbolt symbol showing the connection type. I do not think either one of those clones completed successfully.

Also, it does not look like Windows is installed either.

 

[churin]

That is right, none of those two drives shown boots Windows. The build-in SSD on my Mackbook has 512GB capacity and the external USB SSD drive is 250GB. Does this has something to do with the problem.
The following show what the Disk Utility shows.

 

[ferrarr]

OK, then, to me, it looks like the external has the OS and the Recovery partition showing. Which is correct.

What did you use to make the clone?

 

[churin]

I used Diskutility. I am worndering why the Boot Camp partition was excluded from the clone. I have not installed any app on Windows 10 so that space required for OS X and W10 is far less than 250GB which is the capacity of the external USB SSD drive.

 

[Slydude]

I used iPartition. I am worndering why the Boot Camp partition was excluded from the clone. I have not installed any app on Windows 10 so that space required for OS X and W10 is far less than 250GB which is the capacity of the external USB SSD drive.

Mac cloning programs do not clone the Windows/Boot Camp drive partly due to the fact that the Windows partition has a completely different file structure. As a general rule cloning dual boot Mac/Windows systems such as your involve the following steps:

1. Clone the OS X partition using the software of your choice (Carbon Copy Cloner, SuperDuper, etc).

2. Clone the Boot Camp partition as a separate step. You can either use your favorite Windows cloning utility while running in Boot Camp or you can use WinClone. WinClone allows you to clone the Boot Camp partition and save the resulting image file on a Mac formatted drive.

The only way I know of to clone the OS X and Windows setups simultaneously is when you are running Windows in a virtual machine setup.

 

[churin]

Thanks for your reply.
OK, I now understand that the Mac disk utility can make a clone of OS X only and cannot make one which include the Boot Camp. Question still remains is why the two identical clone drives show up on the boot manager as in my former post above. How can I get rid of one of them?