Windows 10 new install and hard drives are missing

I have done the following:
1. determined the missing hard drives are not appearing in the Disk Manager
2. determined the missing hard drives are not appearing in the Device Manager
3. Assured the drive continue to be powered and physically connected
4. Read many help articles about the topic

Interesting note: I have a dual-boot system, the  pre-existing one is Windows 10 (older version); when I boot to that OS instance, I see all my hard drives
Since I am not even seeing the drives in Device Manager in the new Windows 10 install, I imagine the solution will either be a special KB update or something obscure I cannot even imagine :(

Thank you!
JohnD

THIS IS THE VIEW FROM THE NEW WIN10 INSTALL
Windows 10, new install Device ManagerWindows 10, new install Disk Manager
THIS IS THE VIEW FROM THE DUAL-BOOT (FAILOVER) WIN10 INSTALL
Windows 10, dual-boot (failover) Device ManagerWindows 10, dual-boot (failover) Disk Manager
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John DarbyPMAsked:
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Tom CieslikIT EngineerCommented:
Did you set drive encryption in your Older Windows 10 version >?

Do you have any red or yellow flags in device manager in new WIndows 10 ?
McKnifeCommented:
To see a drive, you need a driver for the hard drive controller. Is it installed?
What controller are they connected to?
John DarbyPMAuthor Commented:
Greetings, @Tom, none of the drives are encrypted. @McKnife, these drives have loaded fine without 3rd party drivers since I have been using Win10.

Every 6 months I install a fresh Win10 and leave my oldest (functioning) Win10 install intact for a failover dual-boot. This is the first time I have experienced the 'absent hard drive' problem

Thank you, guys!
JohnD
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McKnifeCommented:
Sounds really funny. But will you share how they are connected, or not? What controller is that?
John DarbyPMAuthor Commented:
Ah sure can! They are all connected via SATA on the mainboard :)
McKnifeCommented:
And the OS drive is connected to the very same controller? You know, some mainboards have two different sata controller types with different drivers.
John DarbyPMAuthor Commented:
@McKnife - there is one controller block on the mainboard (5 sockets) and five are occupied by the SATA connected drives and BlueRay device
McKnifeCommented:
Ok. You could experiment a little, like disconnect all devices but the OS drive and one external drive and see if that makes a difference.
Is there any software installed, yet?
John DarbyPMAuthor Commented:
@McKnife - I will retry this: remove all connected devices and confirm boot; restart and add one connected device (try one at a time to see if any are recognized)
The new OS install is disposable (no extra software installed, yet)
John DarbyPMAuthor Commented:
@McKnife - I have done the disconnect, reconnect experiment...with reconnecting one at a time. The OS refuses to see any of the devices
joinaunionCommented:
What make and model is the motherboard?
Do you see the disk if you use diskpart?
Command prompt then type in diskpart then list disk.
McKnifeCommented:
Ok, boot windows setup and verify if setup sees all drives. if it does, install windows clean and see if they show up.
John DarbyPMAuthor Commented:
@joinaunion - diskpart on the new install is missing the drives, but diskpart on the old system shows them as expected - thanks!
@McKnife, let me give a try to what you suggest...back in a bit :)
John DarbyPMAuthor Commented:
@McKnife, all the drives (and partitions) were visible during setup; setup is running now
John DarbyPMAuthor Commented:
@McKnife - the reinstall completed. None of the OS tools see the drives (diskpart, disk manager, device manager)...I took a look at the BIOS settings and all the USB features are enabled
joinaunionCommented:
Sorry forgot to ask.Are these external drives that are not detected?
John DarbyPMAuthor Commented:
@joinaunion, the drives are internally connected. The external (USB) connected drive is visible as expected. Also, the internal SATA DVD drive is available as expected...just no sign of the internal SATA hard drives
joinaunionCommented:
The power cables for hdd didn't get disconnected did they. I'm sure you checked just confirming.
John DarbyPMAuthor Commented:
@joinaunion - that would have been a relief. Sadly no. Right now I am taking some older hard drives and experimenting to see if I can get any other SATA devices to appear.
joinaunionCommented:
Is your bios set ahci mode?

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John DarbyPMAuthor Commented:
@joinaunion, not sure
John DarbyPMAuthor Commented:
Greetings friends, I kept experimenting without success. I decided to reset BIOS to factory defaults. That worked...but, I am not sure what setting was blocking hard drive addressing. Thanks for your help!
joinaunionCommented:
Most likely ahci was not enabled or somewhere down the line it was changed. Glad its working now.
McKnifeCommented:
Your 2nd installation (dual boot) was on the same drives, right? This solution makes no sense to me, if it was, since with the old bios settings the 2nd installation saw the drives. Very weird.
John DarbyPMAuthor Commented:
Great point @joinaunion

@McKnife, this is what I know (not much): my older OS in the dual boot is Win10 1803 and the new install is 1809. Only as a last resort did I perform the Restore Factory Defaults. But, when my tinkering with BIOS settings didn't fix the problem, I went ahead and did the reset. However, some setting was changed that made the difference. On another note, I got a message back from my Windows Product Group POC and he said the problem is a known bug (I don't have details, sadly) and the bug is set to be resolved in patch 11D, to be published at the end of this month
Apologies I have nothing more substantial to offer
joinaunionCommented:
@McKnife,
AUTHOR Comment posted21h
@joinaunion, the drives are internally connected. The external (USB) connected drive is visible as expected. Also, the internal SATA DVD drive is available as expected...just no sign of the internal SATA hard drives
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