Comment 31 for bug 1861235

I've uploaded the latest version of zfs with debugging enabled (--enable-debug) in this ppa:
https://launchpad.net/~arighi/+archive/ubuntu/zfs-linux

sudo add-apt-repository ppa:arighi/zfs-linux
sudo apt-get update
sudo apt-get install zfs-dkms

It'd be interesting to repeat the test using this version. Make sure the loaded zfs module is matching the right version:

$ modinfo zfs | grep ^version
version: 0.7.5-1ubuntu16.10+lp1861235

Moreover, if the data got corrupted, it'd be interesting to know why... can you provide some smartctl information? Did you notice any I/O error in your logs? Thanks!