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#11
One possible problem may be that you first set your boot drive order and then set the mode to ACHI.
I had a similar problem on my gigabyte motherboard a couple of days ago when I copied my old boot drive to a new SSD.
In essence, the problem occurs because when you change the access type from IDE to ACHI, a different internal controller is used which in effect changes your booot order because the ACHI mode is now considered as a SCSI type of device which is commmon when one isn't using the IDE mode.
If you check your boot sequence, youmay find that it is now pointing to a different location than what you want.
Once I reset by boot order AFTER setting the BIOS to ACHI, the motherboard instantly found the correct boot drive.
I would hazard that your SSD has an internal disk id other than C: and your old drive still has the C:.
One other thought regarding alignment, While I was still running WIN 7 PRO using a regular hard drive, I simply used the Disk management function under 'my computer\manage\disk manager' to initialize my new SSD and create the new boot partition. Under WIN 7 this does assign the correct alignment.
I then used my backup CD copy of Acronis True Image Home 2011 (ATIH2011)to simply copy my previously backuped WIN 7 OS partition to the newly created partition on the SSD. I did the restore of the OS partition only, not copying the boot part with sector 1. After I copied the OS partition, I then copied the boot part in a seperate step which only takes a couple of seconds.
Note: When ATIH2011 makes a backup copy of a PARTITION, it creates both a copy of the partition and another smaller copy of the boot sector. When doing a 'restore' of a boot partition, do not use the 'CLONE' function, use the partition restore function instead. If your current hard drive (HDD) has multiple partitions on it that you want to copy to a SSD, first 'restore' the partition containing the OS, then the 'boot partition' and then whatever other partitions that you want.
I spent a few days researching how to copy from a HDD to a SSD while maintaining the correct alignment and basically, the way that I did it does work correctly.
Any hard drives other than the boot drive are not affected by changing from IDE to ACHI mode other than working faster.
Finallymotherboards differ in how the use the BIOS and therefore the above procedure might not work correctly. During my ersearch, I did find several other users who did the migration from IDE HDD to a ACHI SSD using the above procedure with no problems at all other than what you have experienced with the boot failure due to the actual controller being invoked which then changes the actual internal address of the new SSD boot drive.