I succeeded booting from SATA perfectly using your thread. Thanks a lot.
After I configured my pogoplug, I connected a HDD that I used for pogoplug to my pc for backup the data.
I reconnected that to my pogo, however it keep blinking and the mac address changed from 00:25:31:XX:XX to 00:30:E0:00:00.
After setting for booting from SATA, can't I connect the HDD to other devices?