if connector of sata 1 can detect disk of sata 3

[dima0265]

if connector of sata 1 can detect disk of sata 3

 

[jitpublisher]

if connector of sata 1 can detect disk of sata 3

Yes.
Some drives have a jumper on them you have to close that allows the drive to present the proper SATA version to the BIOS, other times it is simply automatic.

 

[008Rohit]

Did you mean if SATA I cables can run SATA III drives? I think yes, but limitting the bandwidth to 1.5GB/s.

 

[jtennison]

if connector of sata 1 can detect disk of sata 3

If I understand your question correctly, I believe the answer is "no". Each sata drive is independently connected to controllers on (or connected to PCi or PCIe bus) the motherboard. A controller knows how many sata drives are connected to it, and software running on the CPU can determine the total number of sata drives connected.