Can I Simply Add an HDD to an Existing SSD Boot Drive?


i have completed project upgrade innards of mid-2010 imac new hdd , new ssd. os installed on ssd, want make fusion drive hdd. when try follow terminal instructions create 1 drive, cannot unmount ssd (presumably running os x).

can add hdd same volume on ssd, or have go through pain of booting external drive?

thanks!
 

you have boot external, create fusion drive, format both ssd , hdd , need reinstall fusion.

tbh there wont real world benefits of fusion on deciding keep os , apps on ssd , data on hdd. fusion mean more complications , potential problems (as have discovered), treats both drives single volume failures mean have serious problems.

advice run them seperate drives.
 


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