Full ext4 on a memory card in android. Need?

Question

linux

On a tablet with cyanogenmon 9 (now already 10), I really lacked a file system on a memory card that can store files of more than 4 gigabytes (I like to watch 720p movies on the tablet). With a “cavalry swoop” I neither ext4 (android is still at the root of Linux, so this is the first thing that came to mind), nor ntfs could not get any of the ready-made tools to work.
On the Internet, from the most constructive answers were “What for you files are more than 4 gigabytes?” and "In cyanogenmod10, a patch for working with ext4 has been proposed, but it has not yet been verified, when it will pass is not known."
As a result, I had to sit down myself, think and come up with some almost turnkey solution that allows you to use memory cards with ext4 quite comfortably.
I also did some steps at the stage of creating and mounting a file system to speed up the speed of working with ext4 on a memory card.
I think to state all this to the public in a post. But I'm not sure it's required. Tell me do you need it? If "yes" - say at least 5 people, I'll write.
Do I need a section about ext4 optimization for a flash drive? It is actually the largest, most complex and already written on the Internet in English.

Answer 1

It would be interesting for me.

Answer 2

Certainly interesting information.

Answer 3

Very relevant, be sure to write.

Answer 4

Write.

Answer 5

Optimize better BTRFS, ext4 is futile to optimize.

Answer 6

Of course write. A section on optimization is a must, especially if there is something about wear optimization.

Answer 7

I join. This is a promising development. Write

Answer 8

And what are its advantages over Ext2?

Answer 9

It would be interesting to read about ext4 optimization for flash.

Answer 10

Of course you do. After all, video recording from the camera in FullHD quality lasts up to 15 minutes, and (according to some sources) in UltraHD quality - up to 5 minutes.
PS. Also on Android devices, there is an eternal problem with the lack of internal memory for applications, in most devices it is only 1-2 GB, which is only enough for 100-300 small applications.
PS2. Although, if I'm not mistaken, programs in Androta can only be installed on the EXT partition, but maybe someone will need a program that mounts NTFS partitions (can pre-format it) -- called Paragon NTFS +, only requires Root1 It will fit perfectly for flasks and large SDXC cards . But I haven’t tried it myself, they say that there are explainable failures during loading.

Answer 11

Very interesting and relevant to me