Pata drive removed sata failed to boot

[vishalvvraut]

Hello,
I have a Samsung PATA HDD (80gb) and a Seagate SATA (750gb) with Windows 7 ultimate loaded on both. When PATA is disconnected and I try to boot from the SATA HDD; it shows disk boot failure. I checked SATA HDD for bad sectors and with Ubuntu SMART scan. No problems with the disc. SATA is also detected in bios and boot screen. If I reconnect PATA; any of the two OS could be accessed. Why PATA is used as a initiator for booting?
My MB is Gigabyte MA78GPM-DS2H. Processor AMD PhenomII X4 955, RAM 4gb.

 

[rolli59]

When you installed Win 7 did you have both drives in the computer? My suspicion is that the PATA drive got it first.

 

[vishalvvraut]

No it was done exclusively.

 

[rolli59]

And the SATA drive is first in the boot order in BIOS? If so try a repair install!

 

[vishalvvraut]

Yes. Thanks. I had thought of the same option.

 

[vishalvvraut]

It fails. Another option is to format and reload after disconnecting the PATA. But formatting is a bit heavy on heart.