Why does the system not see 2 SSD disks?

Question

Hard disks

Good afternoon.
Initially, the laptop had: 1 SSD for 240 GB and HDD for 1 TB. I installed SSD instead of HDD, and threw HDD instead of ROM through a sled. Everything worked well. They brought me a clean SSD yesterday and asked me to throw the info there. I removed the HDD and replaced it with this SSD. The result is: 1 SSD with Windows is in place of a hard one, and the second is in place of a ROM. I start the laptop - the system does not see a single disk. In the BIOS, it sees 2 SSDs on the main one, but none in the boot selection section. I take out the 2nd SSD and return the HDD to its place. I launch - everything is fine, it is loaded without problems. What is the problem? Can't install 2 SSDs at the same time?

Answer 1

Maybe you have a boot partition on the HDD?