Switch USB filesystem to ext4 about teslacam HOT 12 OPEN

Tesla's officially docs say it must be FAT32 but this is not true, the car will mount and happily write to
ext4 tested on my model 3 software version 2019.20.4.2).

Actually, it doesn't. It says ext3/ext4 is fine as well. See:

https://scontent-ams4-1.xx.fbcdn.net/v/t1.0-9/65303970_957692474568953_5781248575686049792_o.jpg?_nc_cat=103&_nc_ht=scontent-ams4-1.xx&oh=ca3b804e2b8f855934a61ed7bc871d48&oe=5D8C007A

So I agree with you, I believe we should go with ext4.

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I got a little excited, we cannot mount it at the same time. But the car will handle ext4 well as far as I can tell. The journal alone might help with FS recovery and corrupted file system that FAT is plagued with.

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Tested and working with ext4. Both with Teslacam and by formating just a normal usb stick.

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Yes, type 83.

execSync(`echo "type=83" | /sbin/sfdisk ${IMAGE_DIR}/cam${imageNum}`, { bubbleError: true });

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Do you still need to setup a partition table?

While I don't know for sure (but I can try it out sometime), I don't think that is required. When you plug in a non-partitioned (but formatted) ext3/ext4 drive in a Linux system it works fine. You can mount is using something like mount /dev/sdb /mnt

I don't see why this would be different in Tesla (which is just Linux).

Of course the only exception would be the separate cam and music disks, which would require partitioning.

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Do you still need to setup a partition table?

While I don't know for sure (but I can try it out sometime), I don't think that is required. When you plug in a non-partitioned (but formatted) ext3/ext4 drive in a Linux system it works fine. You can mount is using something like mount /dev/sdb /mnt

I don't see why this would be different in Tesla (which is just Linux).

Of course the only exception would be the separate cam and music disks, which would require partitioning.

In my testing I was unable to get the Tesla to see the drive w/o setting up the table. Anything else I tried I ended up with the grey X on the camera. Maybe I was doing something wrong.

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I'm addressing this issue on branch https://github.com/milesburton/teslacam/tree/add-ext4-filesystem

It's not quite as straightforward as fat32 as it requires you to modify the kernel params. I suspect @wurmr may have a clever solution to get around this in docker

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ext4 appears to work in my MS on the latest update via a USB flash card. The branch above needs to be updated to include @wurmr's optimisations

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On this branch @wurmr, how much work would it be to merge this into your docker setup? Any chance you would test it with your setup?

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@milesburton I'd say make a PR and let's take a peek and work through it.

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