HD drive can't be recognized as bootable startup disk

Hi
I am using a MacBook with snow leopard. The HD is almost full, so I install new bigger HD. I used disk utility to restore the new disk from the old disk.
But the mac can't recognize the new disk as bootable startup disk. I get nothing when try to set startup disk in "System Preferences". There is only "Network Startup" option is available.
Every time start, I need to press the "Option" when I turn it on, and select the disk manually.
What should I do? Is there a configuration file so I can set the disk to be the startup disk?

Nihao GuoGuo & welcome to discussions.
Your new HD needs to be set for 'GUID' before it can function as a boot drive on an Intel machine - this means for use with Snow Leopard, which requires an Intel processor, the disk must have a 'GUID primary partition map'.
You should use the version of Disk Utility that is supplied with SL (/Applications/Utilities folder) and reformat the drive if you want to use it with your current configuration. When reformatting, create at least one partition (primary) and enable the GUID option at that time.
Without this particular configuration, the drive will not be able to perform as a boot drive with an Intel based computer and OS X 10.6.x

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