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HDD became unallocated after cloning windows drive

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HI,

I bought a 1TB Crucial SSD to replace my 128 GB SSD. I also have a 1 TB Western HDD. I cloned my 128 GB SSD to the new SDD using Acronis and then restarted my PC. 

It did not boot up and so I removed the new SSD and restarted. Now it boots but the WD HDD does not show up in Windows explorer. In Disk Management it shows as healthy. The curious thing is that some part of HDD has become unallocated. Does anyone know what happened?

Any help on this is greatly appreciated.

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Maz, welcome to these public User Forums.

Sorry but have more questions than answers at this point!

What actual version & build of ATI are you using for this clone operation?
Is it ATI 2021 build 35860 (latest build) as per this forum, or a different version such as one supplied by Crucial with the new SSD?

How did you attempt to perform the clone operation?
Was this done from within Windows after installing ATI?
Did you create the Acronis Rescue Media and boot from that media to do the clone?

How was the new SSD connected to your PC?
Was this installed inside the PC or connected externally via USB or a dock etc?

Did you try to boot from the new SSD while the original 128GB SSD was still installed?
Or with the new SSD connected via USB?

Please see KB 56634: Acronis True Image: how to clone a disk - and review the step by step guide given there.

Note: the first section of the above KB document directs laptop users to KB 2931: How to clone a laptop hard drive - and has the following paragraph:

It is recommended to put the new drive in the laptop first, and connect the old drive via USB. Otherwise you will may not be able to boot from the new cloned drive, as Acronis True Image will apply a bootability fix to the new disk and adjust the boot settings of the target drive to boot from USB. If the new disk is inside the laptop, the boot settings will be automatically adjusted to boot from internal disk. As such, hard disk bays cannot be used for target disks. For example, if you have a target hard disk (i.e. the new disk to which you clone, and from which you intend to boot the machine) in a bay, and not physically inside the laptop, the target hard disk will be unbootable after the cloning.

 KB 61665: Acronis True Image 2019, 2020 and 2021: Active Cloning in Windows