What is the file system on iphone?

Question

Is it HFS, HFS+, HFSX? Is it the same in ipods, ipads and iphones, and across different versions of iOS?

Answer 1

It's HFSX.

According to "Mac OS X, IPod, and IPhone Forensic Analysis DVD Toolkit" book, the IPhone Partitioning scheme (which is quite similar to similar to Apple TV) contains:

1 - A first Master Boot Record partition (around 500mb),

2 - followed by an Apple_Free area,

3 - then a a first HFSX partition, which primarily stores the iPhone's operating system.

4 - Again, another Apple_Free area

5 - and finally the second HFSX partition holding all user data (apps, movies, pictures, whatever)