Asus t100ta
windows8.1のタブレットPCにアンドロイドを入れたい。
でもSSDの容量が少ないので、micro SDにOSを入れたい。

BIOSの設定で
Secure bootをdisableにしたら、EFI起動可能なUSBメモリからのブートはできた。

しかし、同様なものでもmicro SDからはそもそもbootable diskとしてBIOSが認識しない。
これは以下の理由によるらしい。

It won't start from "USB device" unless it is through a card reader (tested-working) and changing the boot order doesn't help.
The slot is treated differently for some reason. (It's a different computer but it may be the same problem). From this forum:
http://forums.lenovo.com/t5/X-Series.../494013#M28571
"The internal SD card reader is not a bootable device.
It's connected to PCI-E bus (for better performance I think, it showed much higher speed than average external ones), which means BIOS could not access it like commom internal/USB drives (mSATA is a new category but basically internal drive with a new interface).
Even the BIOS could recognize it, the on-card software needs driver for the card reader, or they will simply fail to load themselves because they cannot access their own media."

引用：http://ubuntuforums.org/showthread.php?t=2203358

いろいろ試してみる予定。
掲示板
http://ubuntuforums.org/showthread.php?t=2203358

Boot from internal SD card slot [HOWTO] [WORKAROUND]!!!
http://www.mydellmini.com/forum/general-discussion/6670-boot-internal-sd-card-slot-howto-workaround.html

Eeebuntu 2.0 SD Card Installation on the Aspire One
http://www.osnews.com/story/20743/Eeebuntu_2_0_SD_Card_Installation_on_the_Aspire_One

Plop Boot Manager
https://forum.plop.at/index.php?topic=1369.0

USBブートできない機種で擬似的にUSBブートする－Plop Boot Manager
http://www.alb.jp/%E3%82%B3%E3%83%B3%E3%83%94%E3%83%A5%E3%83%BC%E3%82%BF/usb%E3%83%96%E3%83%BC%E3%83%88%E3%81%A7%E3%81%8D%E3%81%AA%E3%81%84%E6%A9%9F%E7%A8%AE%E3%81%A7%E6%93%AC%E4%BC%BC%E7%9A%84%E3%81%ABusb%E3%83%96%E3%83%BC%E3%83%88%E3%81%99%E3%82%8B%EF%BC%8Dplop-boot-mana/