📎 AI Summary:
The thread discusses a server issue where the user, after installing Windows Server 2019 on an SSD, adds a GPT-formatted HDD but encounters a "Non-system disk or disk error" and the server won't boot. The user explains they avoided installing with the HDD connected initially to prevent it from being converted to MBR, which would limit the drive capacity, but now faces boot problems when adding the HDD later. A responder suggests checking the boot order in BIOS, implying the server may be attempting to boot from the wrong disk. Overall, the conversation centers around troubleshooting the boot problem caused by adding a secondary HDD after OS installation.
Distorted Vision

Distorted Vision

Senior Member
Joined
Jun 18, 2022
Messages
480
Thread Author #1
I've had this issue before. I have a clean install of WIndows 2019 Server on a HP Proliant Gen8 Microserver.
I installed it with just a SSD.

I then powered it off and added a HDD which is GPT and NTFS formatted with data on it. But it won't boot afterwards and gives error:

"Non-system disk or disk error"

The reason I installed Windows Server without the HDD installed is because it would convert the HDD to MBR and put the System Reserved Partition on it. The problem is I'd lose 2Tb of a 5Tb HDD because MBR only supports 2Tb. It seems ridiculous that you cannot add a HDD afterwards and doesn't seem right to me. It happens before everytime I try to install in this way.

Can anyone help please?

Many thanks!
 

Neemobeer

Neemobeer

Windows Forum Team
Staff member
Joined
Jul 4, 2015
Messages
8,995
#2
Have you checked the boot order? Sounds like it's simply trying to boot from the other disk
 

Solution
You must log in or register to reply here.