Wich board to correctly move OS to an external HDD

[oly]

Hello,

Five years ago, I bought a LIME2 SERVER package (no more available) with

- 1 A20-OLinuXino-LIME2
- 1 metal box for it
- 1 metal case for SATA HDD
- 1 shield to connect HDD to OlinuXino, linking the box to the case
- 1 power supply


Nowdays, your product line offers many references for A20-OLinuXino-LIME2 with different options.
I've just bought a T2-OLinuXino-LIME2-IND and tryed to use your tool 'olinuxino-sd-to-sata'.
Doing so, I discover that without SPI flashmemory, I need to keep the SD card pluged inside the board so that the system can boot from HDD.
This is not what I want ...

Should I buy the T2-OLinuXino-LIME2-s16M-IND  version in order to use it only from    an SATA HDD (without SD card) ?