Why is SSD not detected via SATA on Macbook Pro mid 2012?

Question

USB

I bought SSD OCZ Vector 150 240 Gb. I connect it via the SATA interface - the system does not find the disk at all.
If I connect it via an external USB adapter, it works fine. That is, the system is directly installed on it, it boots and works with a bang.
If I switch back to SATA, then everything is the same - it is not detected in the system.
The SSD runs on SATA 3, sort of like the Macbook Pro 13" mid 2012 also has a SATA 3 interface, although before that there was a HDD with SATA 2 (Toshiba mk5065gsxf).
Here is a screenshot from the system information: d.pr/i/16ReH
Judging by the speed 6 GB is SATA 3.
What could be the problem?

Answer 1

In general, the problem was in the SATA cable. Replaced it and everything works great.