Two identical hard drives not recognized at same time in W7

July 12, 2013 at 12:39:21
Specs: Windows 7, 2.8/3.0
I duplicated my hard drive so that there are 2 identical drives. However, they are not recognized at the same time. I changed lable and drive letter of one drive. they still do not appear at the same time. how can I use the 2 together? Thanks.

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#1
July 12, 2013 at 16:37:48
"I duplicated my hard drive so that there are 2 identical drives"

What does that mean & what are you trying to accomplish? You can only run from one HDD at a time unless you have some sort of RAID configuration. Assuming you don't, the 2nd HDD should be seen in My Computer & it's contents should accessible, but you won't be able to run anything from it.


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#2
July 13, 2013 at 15:18:53
hi, riider。

I just want to back up. Do you mean if I back up any hard drive, one of the 2 will be useless and should be thrown away?


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#3
July 13, 2013 at 19:29:24
It depends on how you made the copy.
What he is saying, a single machine can run only one OS at a time, but if it is set up to, you can choose which one to use at boot up.
That said, we come to how you made the copy.... If you used a program like Acronis and made a clone of the entire drive, it should be bootable, but you will need to start the machine using the F8 option so you can choose which hard drive to boot to, but you first need to set up both hard drives as bootable and set the boot order so one is the default drive if you just turn it on normally.
If you just manually copied the files or the partition, it will not be bootable unless you at least do a start up repair on the disk with only the one drive installed (assuming you have copied all the required files and/or partition(s)).
If you used another method, please give the details.
If you used Windows Back up to make a disk image of the drive, this is not bootable, but can be restored at anytime/need to the same drive or a new one/formatted one and the result will be bootable (subject to the same conditions above if you are not just swapping one drive for the other one). This disk image will need to be for the entire drive (not just partition) or you will need to rebuild the boot partition as outlined above.

Added: another note, each copy of Windows will consider its own active partition as being on C Drive and assign different letters to all other drives that are connected. When you switch to the other copy, it will also consider its own drive as C Drive so it can get confusing. This is why you need to label each drive within each OS consistently (names) to help you keep them straight.

You have to be a little bit crazy to keep you from going insane.


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Related Solutions

#4
July 14, 2013 at 04:01:37
If you copied/cloned your operating system drive, that means both drives have an active partition. Windows cannot read two active partitions at the same time.

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#5
July 14, 2013 at 11:13:39
Hi, all.

You all assumed my hard drives include OS. What I mean is they are just data drives. No OS on either one. I used Cavalry bit-bit Duplicator. When it was duplicated I have actually 2 identical drives, same label,same drive letter. But I want to use them as regular drives so we can still move files from one to other. I tried changing the label and the drive letter of one. They just won't appear at the same time. Thanks.


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#6
July 14, 2013 at 20:36:01
You probably copied even the drives identifier so it cannot accept that the drives are different since they both say they are the same drive. If it is not too late, try formatting one and just copying over the data only, or maybe cloning just the partition rather than the entire drive.

You have to be a little bit crazy to keep you from going insane.


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#7
July 15, 2013 at 04:18:53
What are you seeing in Computer Management?

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#8
July 27, 2013 at 15:34:51
Hi, Fingers.

I think you are right: the drive's identifier is probably copied.

Hi, Jennifer Sumn.

In Computer Management the drive is there but there is no label nor drive letter, just the capacity (marked "offline"). For the other drive, there is the label, drive letter and "Healthy". Thanks.


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#9
July 28, 2013 at 09:56:54
Sounds like the disk might have been created as Dynamic. What options do you have when you right-click it in Disk Management?

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#10
July 28, 2013 at 10:23:24
Hi, Jennifer Sumn.

When I right-click the drive, all options are greyed out except for "help". Thanks.


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