Doesn't see the third disk?

Question

Hard disks

I have three disks: M2 (256MB for Linux), SSD (256 which I want to allocate for Windows), HD (2trb. Which is rubbish)
The problem is that when I try to connect the SSD, the system does not see it tightly. But when I swap the SATA cable in the motherboard from HD, then the SSD starts to see, but there is no HD. I have already tried three Sata cables, two of which were brand new (and one of them came with the motherboard), but everything remains the same. Doesn't see it in bios either. What could it be?
Mat. Tamohawk b450 board with 6 Sata connectors (tried to change the location, all working)

Answer 1

There can be only one solution: if you occupy M2, then SATA1 is disabled by default.
Again, conditions may vary depending on the motherboard.

Answer 2

On some motherboard chipsets, the M2 and SATA channels overlap.
I put one M2 - minus a port or two SATA ports, put another M2 - another minus a port or two ports.
For example:
AMD B450
1. Took M.2 1 Socket - minus SATA_5/6 ports.
2. Occupied M.2 2 Socket - minus SATA_3/4 ports.

Answer 3

when I swap the SATA cable in the motherboard from the HD, the SSD starts to see, but the HD does not

How many SATA ports do you have on your motherboard?
If right away, and with the limited information available, it looks like you have one SATA port on the motherboard is faulty, or somehow configured in a special way, up to shutdown.

Answer 4

I suppose that there may be different SATA connectors on the mother.
It happens.
I have 4 on my mom. One SATA2, two SATA3 and one SATA6.
Some of the disks, some do not support ...
Although the unification should work.
I read somewhere that in the latest discs, some manufacturers have removed support for old interfaces...

Answer 5

Thanks to all. The problem was solved by choosing the right working sata connectors...

Answer 6

Alternatively, you can try to install a PCI adapter with a SATA connector.
If everything starts up, then I tend to the option described in the first comment.