I used Disk Utility to partition my external drive into four partitions: two in Apple file system (called H1 and H2) and two in FAT (called F1 and F2). However, I found by
diskutil list that an
Apple_Boot partition called "Boot OS X" is automatically created:
0: GUID_partition_scheme 1: EFI EFI 2: Apple_CoreStorage H1 3: Apple_Boot Boot OS X 4: Apple_HFS H2 5: Microsoft Basic Data F1 6: Microsoft Basic Data F2
Why is there an
Apple_Boot partition? Does it mean that now I can boot a Mac using this external drive? But the size of this partition is much smaller than my recovery partition "Recovery HD" on the internal drive, so I don't think this is a full copy of the recovery partition.
I want a "clean" partition without introducing
EFI. (I remember from the old days there was a limit on the number of primary partitions, so having six partitions makes me feel uncomfortable.) To do this, can I use Windows to partition my external disk, and then use my Mac only to format H1 and H2? Can I still use H1 for Time Machine if I do so?