ubuntu dual hard drives ssd + hdd can not boot

Installation environment:
Lenovo y470 laptop upgrade added a ssd solid state drive, retain the original mechanical disc dual hard drives .
ubuntu 12.04

installation experiment:
1, ssd + hdd dual hard drives . No matter which ubuntu installed on disk, the installation is successful , they can not enter the grub boot screen. BIos boot sequence is correct !
2, unplug the ssd solid state disk , hdd mechanical disk installation is successful, able to enter the grub boot into ubuntu system successfully . Re-access the ssd solid after-hours , ubuntu grub boot menu can not enter , you can not enter the system. bios boot sequence is set correctly.
3, unplug the hdd mechanical disk , ssd solid state disk installation is successful, able to enter the grub boot into ubuntu system successfully . Re- mechanical after-hours access hdd , ubuntu can not enter the grub boot menu , you can not enter the system. bios boot sequence is set correctly.

Does ubuntu grub boot , can not manage ssd + hdd dual hard drives ? But the Internet has been a ssd + hdd dual hard drives under win7 + ubuntu dual system installation scenarios it. Lenovo y470 the bios or driver problem , seeking god explanation ! ! Thank
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this when you boot into the next bios, then put the UEFI boot to disable , and then loaded on the line.
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refueling SSD bios use uefi, you can set the boot partition on the SSD as the boot partition . . .
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my bios, there are no uefi enable disable option. Do you want to upgrade bios update driver ? ?
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my bios, there are no uefi enable disable option. Do you want to upgrade bios update driver ? ?   I encountered the ssd notebook comes this way you can, add your own ssd , it is estimated to engage in really bad . . .
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my bios, there are no uefi enable disable option. Do you want to upgrade bios update driver ? ?        I encountered the ssd notebook comes this way you can, add your own ssd , it is estimated to engage in really bad . . .  


I also think the official upgrade , estimated to upgrade the bios update . Thank you for your reply !
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my bios, there are no uefi enable disable option. Do you want to upgrade bios update driver ? ?            I encountered the ssd notebook comes this way you can, add your own ssd , it is estimated to engage in really bad . . .          
  
  
I also think the official upgrade , estimated to upgrade the bios update . Thank you for your reply !   I do not know what you add , my y480, if in addition to optical drives bristle up . . .