I've set up a "homemade" Fusion drive and installed OS X 10.8.4 on my 24" Early 2008 iMac (which does support Mountain Lion). Everything is great except that it appears I have no Recovery partition. 'diskutil list' doesn't show a recovery partition, and booting while holding Command-R just boots my normal system. Also, booting with Option shows two icons for my main volume (the Fusion drive volume), and both appear to boot into the same system (i.e., 10.8.4 with all my user accounts set up, etc.). I assume fixing this would require reloading my system from my backup which I can do but would rather not. Instead, my question here is: do I really need/want a recovery partition? I have a bootable USB stick with the 10.8.4 installer, doesn't that give me all the tools I would need to install or fix my system in the event of problems? Assuming I keep that safe, what would the recovery partition give me that the bootable install USB doesn't? Code: brian@imac:~(0)$ diskutil list /dev/disk0 #: TYPE NAME SIZE IDENTIFIER 0: GUID_partition_scheme *512.1 GB disk0 1: EFI 209.7 MB disk0s1 2: Apple_CoreStorage 511.8 GB disk0s2 3: Apple_Boot Boot OS X 134.2 MB disk0s3 /dev/disk1 #: TYPE NAME SIZE IDENTIFIER 0: GUID_partition_scheme *1.0 TB disk1 1: EFI 209.7 MB disk1s1 2: Apple_CoreStorage 979.3 GB disk1s2 3: Apple_Boot Boot OS X 650.0 MB disk1s3 4: Microsoft Basic Data BOOTCAMP 20.0 GB disk1s4 /dev/disk2 #: TYPE NAME SIZE IDENTIFIER 0: Apple_HFS iMac Fusion Drive *1.5 TB disk2 /dev/disk4 #: TYPE NAME SIZE IDENTIFIER 0: GUID_partition_scheme *1.0 TB disk4 1: EFI 209.7 MB disk4s1 2: Microsoft Basic Data PASSPORT250 250.0 GB disk4s2 3: Apple_HFS Passport750 749.8 GB disk4s3 /dev/disk5 #: TYPE NAME SIZE IDENTIFIER 0: GUID_partition_scheme *320.1 GB disk5 1: EFI 209.7 MB disk5s1 2: Apple_HFS iMac Drive 310.3 GB disk5s2 3: Microsoft Basic Data BOOTCAMP 9.4 GB disk5s3 /dev/disk6 #: TYPE NAME SIZE IDENTIFIER 0: GUID_partition_scheme *1.0 TB disk6 1: EFI 209.7 MB disk6s1 2: Apple_HFS 1TB External Drive 999.9 GB disk6s2 Note: disk4 through disk6 are external drives. disk5 is my iMac's original HDD. Thx!