External Hardisk start up problem

hi everyone, i had a century external USB handisk case with 160gb seagate sata hardisk connected with my PC, this ex. hardisk work fine when i connected to windows, it can be detected, read and write, everything just fine, but if i turn on my PC while i'm connecting with the ex. hardisk, the PC freeze on the below screen, this matter only appear when the ex.hardisk connected to PC and turn on, if i unplug the seagate hardisk and just connect with the century external USB hardisk case, the computer will turn on finely without and freeze of screen, the only thing i can do is to unplug the hardisk first for the turning on the PC, then plug the hardisk back when it the windows totally start up, can anyone tell me why would this happened? and are there anyway to solve this problem so i don't have to unplug and plug the hardisk every time i start my PC? thx alot~

P.S. i'm using windows 7, and my MB is MAGIC PRO MP-AKX Extreme, as i remember, this only happened on windows 7, cause there is no problem when i was using XP...

go into your Bios and make sure that your main hard drive that holds your OS is the only bootable drive marked active under boot devices turn off boot from other devices then try to boot with the external plugged in

computersplus said:

go into your Bios and make sure that your main hard drive that holds your OS is the only bootable drive marked active under boot devices turn off boot from other devices then try to boot with the external plugged in

thx, i have just try your advise, but the freeze screen still happen...

if it's freezing at the post screen like that it suggests that it's not related to the OS but rather a hardware issue

Try turning off the SMART feature also it looks like you have several hard drives try disconnecting all but the primary drive and the external just as a test and see what happens

what are the contents of the external drive does it have OS system files on it from being used as a primary drive at some point?

the ex. hardisk on have one file which is a rar zip file, i have format it and now it is only a backup hardisk...

are you sure you have only the primary drive set as bootable it's easy to miss settings in the bios or think that you have saved your changes but i always go back in a look to make sure settings stuck

so the screenshot is the exact place it freezes just to be sure here

have you tried running a check disk on that drive to make sure there is no issue with the drive at this point