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I have a drive intended to be shared between Ubuntu and Windows. I've tried exFAT and NTFS and have noticed that both have high CPU load. For example, while bringing up a couple of Vagrant instances, the mount.ntfs process uses about 90% of a core, while exFAT generally pegs one at 100%. I've attempted and failed to get exfat-nofuse (https://github.com/dorimanx/exfat-nofuse) to install; there were make errors that appear to require development attention. So, are there read/write filesystems that will perform well and work in both Ubuntu and Windows?

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    Ubuntu can read and write files in NTFS, whereas Windows drivers for ext4 tend to break things. I'd use NTFS for that sharespace. – K7AAY Aug 23 at 23:54
  • Thank you. I've spent a bit more time on this and have found that the NTFS CPU load can be considerably reduced, unlike (so far as I can tell) exFat. So, I'm going with that. Tasks that completely failed previously complete in a reasonable time. – Andrew Aug 27 at 16:08
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Ubuntu has the ntfs-3g package so it can read and write files in NTFS, whereas Windows drivers for ext4 tend to break things. I'd use NTFS for that shared space.

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