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[Solved] Best way to do an NTFS -> ext4 conversion?
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I don't know anything that can do an in-place ext4 conversation, but there's ntfs2btrfs which is already in the Debian repos if you're okay with BTRFS.
Of course, backup anything important, ntfs2btrfs should create a backup snapshot if you need to revert back to NTFS, but I wouldn't count on it.
What's the advantage in btrfs over ext4? I've kept hearing about it since I started with Linux but the only advantage I can see with it is the snapshot rollback feature, which while useful looking, I don't think would be something I would use
It actually checks for corruption, can do raid to fix corruption, is CoW so less likely to corrupt. And it can do transparent compression.
If you are still dual booting, btrfs has a very good windows driver. Btrfs is newer and only recently started becoming the default on a couple mainline OSes. Ext4 has been around forever and is assumed to be much more stable.
Fwiw, I've been using btrfs for the last 18 months or so without any issue. I don't use any of the tools. There's no obvious or immediate performance difference like there was in the old days. We're all on SSDs now and they're fast no matter what.