Well, if it doesn't exist, then a lot of people are using the wrong term. Hardware vendors, for example, sell "SATA II" hard drives. In any case, it's semantics. Everyone knows they mean 3 GB/s. The point is that no one I know of sells a 3 GB/s HDD.
The situation in this thread is exactly the reason that no one should refer to SATA as "SATA I" and "SATA II". The two names imply that there are two different standards -- there are not. SATA is ONE standard.
ALL SATA devices are interoperable.
The only minor exception is that some early SATA controllers had difficulty with drives that implemented 3 Gb/sec transfer rates, and therefore hard drive manufacturers have implemented a selector (usually a jumper) to force the drive to use 1.5 Gb/sec operation. Use this jumper if you're connecting to an early revision SATA controller.
Extensions to the SATA standard can be many more things than just 3 Gb/sec transfer rates. An individual drive or controller can optionally implement any or all of the following in any combination:
- 3 Gb/sec transfer rates
- Hot swap capability
- eSATA compliance
Saying that a device is "SATA II" tells you nothing about the device's actual capabilities. You MUST list the capabilities individually.
So, to the OP, there is NO SUCH THING as a 1.5 Gb/sec cable or a 3 Gb/sec cable. It is a SATA cable. It works with all SATA devices.