Solved Segate SSHD detecting and reading issue.

I'm using a laptop with Windows 10 installed which is having ssd and HDD. Everything was working perfectly. I was trying to install ubuntu where both the ssd and HDD were shown but I partitions ssd and installed os in ssd. Exactly dual booted to say. Sketchy is that the os installed in 2 seconds and it asked for rebooted. So I rebooted. Stuck at the boot logo for long so I did force shutdown. Removed all USB's and rebooted. It did rebooted but very slowly. Then I found that HDD isnt showing. I tried rebooting several times, reconnecting the HDD, resetting the bios, but nothing worked. So I removed the HDD and clean installed windows 10 only into that ssd. Still nothing. I tried connecting that 2.5 inch HDD externally using 2.5 inch to USB adapter, still nothing. I didn't even feel the plates spinning at all. I found a thing that when we connect 2.5 inch to USB adapter to computer it will show a device in the computer with a question mark. But when I connect HDD and connect that adapter to computer its not at all showing a device itself. Like it's not at all connecting. And the indication light for that adapter is getting dim when I connect HDD and vice versa.
Windows is installed on ssd. I have done everything on ssd. I didn't even touched hdd. I dual booted, reinstalled everything on ssd. I don't understand how hdd got effected. A hour ago I saw a drive in the disk management showing it needs to be initialised. When I'm trying that it's showing error as "A device which does not exist was specified". I have reinstalled the entire os after this happened but not fixed

Please help, so much data. I can't afford a new drive.

Downloaded ubuntu from official website, used Rufus to make into Bootable, I did tried just live booting ubuntu before installing. Then these things happens.
Later I made Windows 10 then booted, before selecting drive and installing I cleaned the entire ssd using command prompt.

Rustys said:

Did disk 0 have any data on it that you may want?
You are showing you attempted initialization Disk 0 as GPT have you tried MBR?
What were the results?
Using live Linux does it show the HDD and have you tried accessing it and or formatting it using Linux?

Click to expand...

Data is there but my first preference si for to work the HDD atleast. I can recover some Dat later. I tried connecting accessing it in ubuntu and fedora. It doesn't show at all in the Linux. I'm not good in Linux btw. I just checked in the explorer and used a command to check the current drives
None of them showed anything except ssd.

Rustys said:

Did disk 0 have any data on it that you may want?
You are showing you attempted initialization Disk 0 as GPT have you tried MBR?
What were the results?
Using live Linux does it show the HDD and have you tried accessing it and or formatting it using Linux?

Click to expand...

I tried selecting mbr too. It's saying that there isn't enough space to create.

I tried checking in ubuntu when the HDD is internally connected.
Then I removed and connected to USB adapter then checked in a fedora installed cputer as well as cent os.
My laptop is just 2 years old. Its having i5-8th gen cpu, 16gb ram configured in dual channel, and 1050Ti gpu.
I installed ubuntu manually. I created some space. Then created only three partitions ( "/" "/swap" and "/home").

I'll post the speccy profile with an hour. Sorry for the delay.

Rustys said:

With the HDD attached to the system internally and not USB.

How old is the system and hardware?

When you attempted to install Ubuntu did you manually partition the drive and or allow Linux to do so.

Download then run Speccy (free) and post the resultant url for us, details here, this will provide us with information about your computer hardware + any software that you have installed that may explain the present issue/s.

To publish a Speccy profile to the Web:

In Speccy, click File, and then click Publish Snapshot.

In the Publish Snapshot dialog box, click Yes to enable Speccy to proceed.

Speccy publishes the profile and displays a second Publish Snapshot. You can open the URL in your default browser, copy it to the clipboard, or close the dialog box.

@Bruce @PeterOz can you look at this? Will be busy with work will look in when I can thank you.

Click to expand...

her's my speecy snapshot

It's very sad to hear this.
Btw
I did freshly installed os. Not keep apps and data or sort of anything else. Just made a windows 10 Bootable USB, booted, deleted all partitions in my ssd and installed.
I have installed many times that I didn't remember but never faced any issue.
I did to learn the operating in Linux. I'm experienced in Windows but I don't have much knowledge in Linux except basics.

The laptop is having two drives SSD and HDD. I partitioned and installed os everything in SSD but our of nowhere it damaged HDD. I didn't even touched that drive at all. I don't know what I have done wrong.

Yes but not exactly.
I did installed windows 10. Just after installing the os the above screen shots were the once those were detected.
Later I have updated the drivers and windows then the drive entirely gone.

I understand what you are saying but my drive isnt at all.
i have two drives. one is ssd and otherr HDD. only ssd is showing up. For your reference I'm attaching a screenshot

I would do the same as you mentioned. I did booted from ssd.
Now I'm trying to get the HDD to be detected. I have tried so many way to able to detect but it doesn't shows at all. At last I'm just considering the HDD as broken.

No. The HDD is not at all showing in the bios neither in Windows nor in any Linux operating system.

Just FYI I have removed all my drives but ubuntu and Windows boot manager is showing. My laptop is having rgb keyboard.
I have reflashed bios but all the previous profile I have configured for keyboard are still there and doesn't removing at all.