if the HD was installed with IDE enabled, yes. if you are temporarily using the HD then switch to IDE in the bios. make sure you switch back to AHCI to boot off the SSD.
if you think you may swtich from time to time then change the HD to ahci by using these steps and rebooting:
Exit all Windows-based programs.
Click Start, type regedit in the Start Search box, and then press ENTER.
If you receive the User Account Control dialog box, click Continue.
Locate and then click one of the following registry subkeys:
In the right pane, right-click Start in the Name column, and then click Modify.
In the Value data box, type 0, and then click OK.
On the File menu, click Exit to close Registry Editor.
reboot, change to ahci in the bios and you won't need to worry about it again.
Does it matter if I do both Msahci or IastorV?