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dual booting clone

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I made a clone of my Win 7 boot drive. The clone will boot if I disconnect the original drive. The original will boot when both are hooked up. I remember editing the sys ini file back in XP days to dual boot. I downloaded the shareware version of EasyBCD but it is not intutively being all that easy. In Windows Disk management I have a small system drive 0 reserved partition and the C drive. Drive 1 appears as the letter D for the small reserved parition and drive E as the primary boot partition. BCD sees only one entry in the bootloader:the C drive. It allows for c d e etc on the drop down menu. First of all is what I am attempting to do even possible? Second, which drive letter should I attempt the D labled system reserved partion or the big E drive?  

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Kevin, it is not recommended to have two cloned drives present in the same system.  This can cause a variety of problems with the Windows OS because each drive has the same disk signature.

Please see post: 128231: [IMPORTANT] CLONING - How NOT to do this!!! which was written in response to the problems we see here in these forums caused by cloning drives.

The System Reserved partitions should not have any drive letter assigned and if you attempt to add the cloned second drive to your Windows boot configuration, you will create a dependency between these two drives because Windows will only use one copy of the BCD (Boot Configuration Data) store that is kept on the primary System Reserved partition.  EasyBCD will default to showing you that primary BCD store.

If you really want to use these dual cloned drives in a dual-boot configuration, then you will need to do this via the BIOS settings and manually switch the boot device between the two different drives at that level.  Each drive may show as having a copy of the Windows Boot Loader in BIOS or if not, you would need to select the physical drive one at a time for when booting.

Well I guess I got lucky then as I made no backups before doing a clone. That being said, I will just pull the plug on the second drive. I am going to do a full backup on an external USB drive inclosure. They should consider more pop up warnings if some one clicks on the clone option. 

Kevin, glad to hear that you were lucky with the clone.  We get some unlucky users coming to the forums who have lost one or more drives.  I agree about needing more pop-up warnings but people tend to get a little complacent when you use them too much, plus there are so many different variations of the product being used too (lots of disk manufacturers bundle their branded version with a new drive, i.e. from Crucial, Seagate, PNY, WD etc) so would need a change to every version too.

Take a look at post: 129009: Cloning Confusion - Having 2 Disks As Boot Options from another user in the 2017 forum that touched on this same subject very recently.