Today our target is to migrate OS X from 250GB Hitachi HDD to 160GB OCZ solid-state drive. To do it in proper way we have to take into account a few things:
- partitions must be aligned to increase drive performance
- GPT uses unique IDs, that is why we shouldn’t just duplicate all data from one drive to another, but create a new partition table
- we have to use TRIM for our new SSD to increase drive life
- it would be nice to enable noatime mount option for filesystems on SSD to minimize writes to it
It is strongly recommended to create a full image backup of your HDD first!
If it all goes wrong this is the only way you are going to get everything back.