I am trying to replace the hard drive in an old MBP-15 mid 2010 with a new SSD. The old disk is encrypted. I did that on my own two MBPs successfully, but both disks were not encrypted. The Mac is running OS X v10.10.5.

I reboot the friends MBP with `CMD`+`R` into Recovery Mode and run `Disk Utility` -> `Restore` with the old drive set as "source" and the new SSD set as "backup"

It runs for a few minutes, but then it fails with

```
RESTORE FAILURE
Could not restore - Device not configured

```

The SSD is brand new and connected to the Mac via USB.  

Does anyone have an idea what is going on?

---------- Solution -----------

Thanks for the answers. The simple solution was to exchange the original HD with the still empty SSD and run restore in that combination. I believe it may have been some kind of USB problem, maybe related to the different read / write speeds (slow reading, encrypted disk vs super fast SSD write). Not sure, but it worked. Cheers!