Backwards compatible with SATA-II

[Davros]

Looking at a HDD
https://www.overclockers.co.uk/showproduct.php?prodid=HD-255-SE&groupid=1657&catid=1660
and the specs state
2TB Capacity, SATA 6Gb/s Interface,
7200RPM Spin Speed, 64MB Cache,
2 Year Warranty
** Backwards compatible with SATA-II **
**NEW PLATTER DESIGN FOR IMPROVED PERFORMANCE**

Does this mean there are non compatible drives ?
I remember sata2 was supposed to be backwards compatible with sata1 boards
like hell it was

 

[Blazkowicz]

It's backwards compatible with SATA1, I suppose.
The real reason to insist it's backwards compatible would be that it's less than 2 TiB / 2.2TB, same old story as the 8GB limit and others.

Also, this HDD is awesome. As a system drive (with linux and the MATE desktop), good enough to not need an SSD (the OS is somewhere between a clean state XP and a typical Windows 7 in terms of "heaviness")
The Toshiba HDD can be considered, it's about the same but has better failure statistics (from Backblaze's report)