I've got two 128Gb SSDs installed in my MacBook Pro.
Originally I had one for the system (named Calcium), and one for the /Users folder, symlinked into the first (named Users).
As I ran out of space on Users, I shrunk the Calcium partition and created a 50Gb partition named "Swap" on the first SSD, from where I symlinked some folders back into /Users (namely, my iTunes backup and my work folder).
Now I want to get things a little cleaner before preparing my migration to the upcoming Mavericks release. I'd like to setup a RAID 0 with the two drives, keep my ~75Gb Calcium partition (lowering it to 64Gb is OK), and enlarge my Users partition to take the whole remaining space.
I have a spare 500Gb HDD lying around in a FireWire 800 case and a bootable USB stick with the Mountain Lion installer on it, so my plan is:
- Using my existing system, copy all data off Swap (about 40Gb) onto a folder of the 500Gb
- Boot off the USB installer and start Disk Utility
- Create an image of Calcium onto the 500Gb drive using Disk Utility
- Create an image of Users onto the 500Gb drive using Disk Utility
- Wipe my two drives, create a RAID 0 with them
- Re-create a Calcium partition (64Gb is enough) and restore from the image
- Re-create a Users partition with the remaining 192Gb
- Restore Users from the (smaller, 128Gb) image
- Reboot the system from Calcium
- Transfer data that previously was on Swap (not needed to boot) directly to the new, larger, Users.
According to that other similar question I believe that should work, and my existing system won't be confused when being restored.
My questions :
- do you confirm I won't run into problems with this process? No data loss, no boot problems, no confused OS?
what image format should I use when imaging the partitions at steps 3-4 using Disk Utility?The default read/write format produces a DMG that's fully restorable can I backup a 75Gb partition on a 64Gb image (for Calcium) if it has less used space than total space on the original partition?yes I can, in fact it's the default behavior of Disk Utility when you backup a partition similarly, can I restore a 128Gb image on a 192Gb partition (for expanding Users)?yes I can