How to Fix - Disk management problem?

Disk management problem

Windows 7 setup can not find harddisk (HDD).
In diskmanagement also I can not see disks (OR drives).
even I can not format HDD.
I am getting some errors.
If I open my computer, I can see all partitions (OR all drives) and i can use it.

In cmd (using diskpart command) also i can not find all drives.
in list volume, it showing optical drive(CD or DVD) only.

Additional details

the hard drives have data on them and are partitioned.
I can see hard drives in My Computer but
not in  Disk Management.

I can see other drives in Disk Management
e.g.
an optical (CD or DVD) drive.

I can access the hard drives in my computer.

I have tried using rootkit tools but no use.

Anwsers to the Problem Disk management problem

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