I try to install Debian to a computer and running the installation as usual. I've succesfully installed Debian to a lot of computers in my company. Today, I've got a computer which is installed Windows 7 and I want to change it with Debian.
When I run the installation, after create partitions, there is no disk detected. Usually, I choose one of the disk which I am about to use as my system storage. But this time, there is no drive detected. The only option on the screen is Quit : exit the installer.
I have removed the hard disk and use a new one, but remains undetected in installation. Actually, it was detected when I'm entering Gparted to create partitions. But then, when I close the Gparted, the disk is no longer listed.
What's wrong and how to solve it?
Thank you

Sounds like it is something to do with the machines security setup, (BIOS or UEFI).
You should be able to access the machine's setup utilities by holding down one of the keys at boot time.

Do you mean BIOS setup?
Which part of BIOS security that I need to modify? With my current setup, I could install MX-Linux, but failed with Debian.

Does the BIOS see the (new) disk?

If you can install MX then the BIOS is OK, it is something to do with the Debian installer.
Are you trying to install to a smaller than recommended partition size, that stops the installer, if I remember, as it is looking for a partition of the default size, or larger.

Yes, the BIOS see the new disk

I always use the same partition size, it works well on another PC's, but not this one

How big is the partition size that you are using?

40000 ext2 boot
4000 linux swap

What units are you using?
How much for the / partition?
10GBytes would normally be ample for a GUI install.