DS install & SATA adapter question

[ffdreamshell]

*:embarrassed for my bad english,it's not my native language
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hi all
Recently have finally completed the initial transformation of dreamshell
and i wana to know:
1.is dreamshell can boot from chip?
in my memory,dreamcast's bios chip capacity is 2MiB
but when dreamshell folder un7z it's capacity are 44.9MiB larger than 2MiB
in that moment,how to install dreamshell to bios chip if possible?

2.what is SATA adapter Selection criteria?
i know dreamshell support SATA HDD but need adapter
now i want connect 2.5inch SATA HDD and place into dreamcast case
i want to know the power pin socket is necessary?
Which product is what I want? adapter1 or adapter2?
adapter1:

  adapter1.gif (Размер: 48.27 Кб / Загрузок: 26)
adapter2:

  adapter2.jpg (Размер: 45.67 Кб / Загрузок: 27)